Supercharger and rear tire replacement ruined the way my f type drives
 

Has anybody else had to replace the supercharger at 25k miles and had handling problems? It doesnt help that the rear tires were replaced at the same time.

Oh, i should mention that even though i am a female, my father taught me how to work on my own cars beginning as soon ad i could see over the fender. He is now retired AF whose work was ranging from the Firebee drones to Apollo flights, and the Project Manager for the General Dynamics Centari missle.
So my training was not just on cars, it included how much force was needed to put something in space and other mechanical theories a girl could care less about.

My dad while in England met and married my very british mom and came back to the us with a new jaguar included with their luggage. My mother has driven a jaguar ever since, and my dad always took care of them. Anyway that was now 60 years ago, and in jan 2017 i changed my life and walked into a jag dealer and paid for my f type with cash. So...

I took my f type to dealer complaining about excessive engine valve tap. First they replaced a fuel pump, but the noise did not change. Next time, i was told the bearing to the actuator rod for the supercharger had water egress, so the bearing was changed and i picked the car up on the day the dealership closed. (Long story) They took great care of my car for the 2 years since i bought from them. I was very used to being treated like a queen. If i had an issue i called and would be told to bring in the next day. I was also given another f type to drive and if they did not have a loaner available, they gave me a new one off the lot. Cant ask for more than that....

With the dealership closing on dec 31st, the jaguar support was then transferred to the local Land Rover dealership. We were told after jan 5th we could take cars in if needed for service. Anyway, the day after i picked up my car, a squeel started, so after 15 miles i parked it and called for service. I had to wait until jan 15th, and on the 20 mile drive there a grinding metal sound joined the choir.

I was told that the squeel was because when the drive belt was installed at time of the bearing replacement, the belt has 7 grooves and the belt was not fully on the pulley. The did not try and explain the grinding metal noise. They told be they were going to replace the supercharger and the rear tires were low on tread. So same continental tires were put on while they waited for supercharger.

Then they called and said once the supercharger was removed, they found 2 valve cover bolts that were really rusty on the inside side of engine, so they had to replace that too. I then introduced myself as a knowledgeable mechanic as explained that they also had to explain how the bolts got rusty, and i knew the supercharger was damaged because the belt was put on routed wrong, not just fully on the pulley.

My first meeting with the service dept manager, the foreman of the shop, and the mechanic was next, and they were shell shocked by meeting me. I introduced myself as their new pain in the ass. Then they told me they believed the water came from the hood vents and i must wash my car too much..... They did finally find a y pipe that was the cause of the rusty bolts and put it back together.

Ever since my car now drives like it is uncontrollable, bouncing down the road, with a drifting feel. I first asked if they bothered to do a wheel alignment when putting the rear tires on, got no answer, so took it to Firestone where they confirmed the caster, camber of rear was way out, plus one tire was also screwed.

The next thing was i went out for dinner and the car would not start, no lights, no crank, nothing. Had it towed in, waited 2 weeks and was told the module in car died, so it was put in and programmed. That knocked out my incontrol setup, so i knew they could have effected everything when programmed.

So since i cant believe the new treads catching the groves in the road are the reason it drifts. But since the supercharger replacement was only thing else done, who else thinks there could be some kind of power vibration making the car bounce, and that they have effected my suspension it allow it to drift?
It is now evil to drive and going to take some real thinking to figure this out, if they ever do... HELP.

Forgot something.
 

Mine is a 2016 base model with 6cyl. Those do not have the adaptable suspension system, and i could see an idiot installing that software into the car.
Also the module replaced, i see i forgot to say it was to the key fob module, that gets signal from fob to be able to start.

Wheel alignent specs 2016 f type
 

Here are the findings of the alignent done. Also good info if needed.
https://cimg4.ibsrv.net/gimg/www.jag...d47f2d6ef0.jpg

1. Sounds like they successfully resolved the grinding/squeeling/tappet noise issues.
2. Even if they totally bullocksed any of the programming, it couldn't have affected your suspension since there is nothing electrical or electronic controlling the ride in an F-Type lacking the adaptive suspension.
3.Applying some Kepner-Tregoe trouble shooting analysis:
What changed between the time the suspension worked well and no longer? The supercharger/engine related work is unlikely to have any effect on ride unless you are experiencing power surging. That's a fore/aft motion, but it sounds like your issue is an up/down, side-to-side motion. The only occurrence which could be causing that was installation of the new rear tires. The alignment could not have been the issue, since the problem was not resolved by adjusting the alignment (also wasn't so far out of spec to cause anything other than uneven tire wear). I would focus on tires, wheels and hubs. Possible issues:
a) Defective tire(s) with delaminated cords or out-of-round
b) Wheel weight(s) not adequately secured and lost shortly after getting back out on the road.
c) Loose lug nuts
d) wheel bent during tire mounting process.
When does bouncing/sway occur: under power, deceleration, braking, steady state, straight line, high speed curve?
Does the issue get worse at specific speeds?

Good luck.

diane, you didn't mention if your car is equipped with adjustable suspension. If it is, then this is the likely cause as the dealer nicked wiring or forgot to reconnect something while they were working on replacing superchargers. Start your troublehsooting by rebooting all electronics by fully disconnecting battery for couple minutes.

Also, in my experience F-type requires better tires than what you have to properly handle. Is your car a RWD by any chance? It is possible that what you are experiencing (and maybe for the first time in a long while due to various mechanical faults) is full power to rear wheels and resulting loss of traction. With stock tires my RWD V6S would break rear end loose in 1st to 4th gear under WOT. I strongly recommend ditching your current tires and upgrading to Michelin Pilot 4S - your car will be transformed and you will instantly regret not doing this earlier.

Keep in mind Michelin Pilot 4S is a summer-only tire and unstable driving below 7C. If this is year-round car you will also need a set of winter tires even if it doesn't snow much where you live.

What kind of tires did you put on the rear (or did I miss that)?

She did mention that she did not have the adaptive suspension, however I can't see where she mentioned the brand of new tires she had placed on the rear. It is RWD since it's a base model. Doesn't sound like a traction problem, though, unless I misunderstood when she mentioned sway. I interpreted that it was a sway or off-center tracking while driving in a straight line. I could be wrong. Different tires will exhibit tramlining to various magnitudes, but this situation sounds different.

Just to be certain, when you use the term "drifting", are you referring to the tires losing adhesion with the road surface or tramlining where the car follows the grooves of the road:

https://www.tirerack.com/tires/tiret....jsp?techid=47

"So same continental tires were put on while they waited for supercharger."

These are all-season tires that are to best of my knowledge standard on base F-type in UK.

"Ever since my car now drives like it is uncontrollable, bouncing down the road, with a drifting feel."

I understood "bouncing down the road" as a verbal flourish instead of reference to lack of vertical damping, with the real issue "it is uncontrollable ... with a drifting feel". I understood this as description of rear end breaking loose. Considering a reported history of SC and engine issues, it is quite conceivable that getting back full power would result in what was previously acceptable throttle application to car sliding around with rear end breaking loose. Consequently, my advice was to get better tires that would offer more traction, as suggesting a different driving technique might be considered rude.

Check the tire inflation. They might be way over inflated.

I'm with Unhinged; stated issues are unlikely to have anything to do with the engine or supercharger and I'd concentrate on tires, wheel damage, wheel balance, wheel alignment


Dave

What do you mean by "one tire was also screwed". A screwed tire could cause these problems, depending on how it's screwed...

Also, do these symptoms occur at WOT or when just cruising down the road?

Solved - change of supercharger killed my car
 

I sm happy to announce that i am smarter than the jag mechanics. I finally put my car up on ramps and shimmied under it.

The answer is that i do have a damper controlled suspension, it just has no ability for driver changes or choices, even though it is a base trim. This was proven when i found the road height sensor on right side of car. It didnt take long to see there was a empty bracket on the left....

Probably when the floor sweeper put my tire on, he hit it and broke it, so it was removed. Im happy, i solved 2 things at once.

Thanks for all the replies. Yes my term of driftiness was shorthand for what i told service guy. The car bounced and swerved uncontrolably, but the groves in the road just made it stronger.

Ride height sensors - iscm-

bump rebound control - monitors the position of the wheel 500 times a second and increases the damping rate as the shock absorber approaches the end of its travel.

Wheel hop control - detects when the wheel starts to vibrate at its natural frequency and increases the damping to reduce vertical wheel motion.

So, chalk up another win girls over certified guys.

Solved - change of supercharger killed my car
 

https://cimg4.ibsrv.net/gimg/www.jag...bd28643247.jpg
https://cimg7.ibsrv.net/gimg/www.jag...7fb6986740.jpg
Sensor here. Arm attached to white plastic piece
https://cimg9.ibsrv.net/gimg/www.jag...b54493ed6f.jpg
No sensor attached to white plastic piece. Blue paint dot is corner of the bracket where it should be
https://cimg8.ibsrv.net/gimg/www.jag...7fd1f68f5f.jpg
At end by blue fuzz you will see outline of half circle bracket that sensor should be attached to.

Great detective work!

You Go, Girl!
(And keep being a pain in their ass!)

Very interesting. So some base trim cars have variable suspension. Can you tell me if you have a wire/connector going into top of the strut when you looking from the engine bay?

I think the wires on the left make it a yes answer.
https://cimg5.ibsrv.net/gimg/www.jag...129c9454b3.jpg

I have now intentions of going east on them. Then are still quite shocked that i am i girl. When the needed to reprogram my key fobs i had to go up there to switch out the rear spoiler i had put on. When the old piece is removed it has the lifting motor attached and the scan took could not see past the missing piece. Well it takes about 10 min, 12 bolts for plate attached to car, and 4 bolts that attach spoiler to plate. So i went up and in parking lot swapped them out to be scanned. But i only put 2 bolts in to hold old piece, put spoiler in front seat and took rest of bolts with me.

After repairs were done, they said i could come pick it up and they wanted to wash it. Knowing there were only 2 bolts holding it on, i said i would come swap it out again before they washed. He said great, i will have car in service entrance drive right next to my window office. So i called my dad and while chuckling i said, "you know what that means, right?" To that he replied "give em a good show".

So since you dont know me, that meant i had to show up to do this in a short dress and heels carrying a purse only big enough for the 2 tools needed....... When i got there i surely had all the mechanics attention, even a few commenting on how they liked my dress or how nice i looked.

Well you know the "priceless" commercial? Picture this, i was then escorted to my car to do this swap and it was smack dab in the middle of the service area...PRICELESS.. I have never seen so many shocked looks from so many people at one time...It took me about 5 minutes to swap this time, and i picked up my old deflector piece in one hand and walked over to the bench outside the service garage entrance, set it down on the bench next to me and smoked a cigarette. I then waited for them to wash my car which took about 30 minutes.

In the meanwhile, remember i am located just outside the side entrance which is the busiest where the entire service advisor desks are located, and everyone must walk past me to go into service area with this large piece from the back of my car next to me on the bench in a dress. Surely not a normal site around there. When the shop foreman and service manager walked by i said "oh no, she's back"
https://cimg1.ibsrv.net/gimg/www.jag...4acd70a472.jpg
https://cimg0.ibsrv.net/gimg/www.jag...681d5093a2.jpg

Anyway, yesterday after finding missing piece, i called Jeremy, my service advisor that did transfer from the closed jag dealer to the land rover dealer and i said "I AM SMARTER THAN YOUR CERTIFIED GUYS.... I FOUND THE PROBLEM..THERE IS A PIECE MISSING" He replied, I never doubted that you weren't smarter. I said " AT LEAST WHEN I TRY AND FIGURE OUT WHY THERE IS A PROBLEM, I START BY GETTING UNDER IT IF NEEDED AND LOOKING"
So the part has been ordered and when it comes in i am goiing pull on the shop foremans choke chain and rub in the fact that after they have had it twice to figure out the problem, all i had to do was look to find it. Then i will find out if the technician can fix the programming part of my suspension. I will post a follow up. But love the new spoiler....
https://cimg0.ibsrv.net/gimg/www.jag...42751f1f14.jpg
https://cimg8.ibsrv.net/gimg/www.jag...8121cb0676.jpg
Side with ride height sensor.
https://cimg2.ibsrv.net/gimg/www.jag...1691a8c2ed.jpg
Side without ride height sensor. If you look at the little blue paint dot, that is the bracket where it supposed to be attached

So as you can see, my build project shows i am not a typical girl at all. Powered by caddy northstar and has been so close to running for years. Only need last piece of wiring from engine compartment to dash, and i have not done a damn thing in ages. Now i have a new love in my life, but since my husband (now deceased) said i would never finish it that is one thing i have to do, even if he wont know.
https://cimg7.ibsrv.net/gimg/www.jag...fbb85c5509.jpg
https://cimg3.ibsrv.net/gimg/www.jag...3fe0688416.jpg

Well, cheer all, nice sharing with you. I will keep you updated on jag repairs. You see, as far as the shitty support and service now given to us by the land rover guys, the jag stuff got dumped on them. I need to remember to be patient, after all, i am the vice president of the san diego jaguar club, but it isnt a fair playing table if i throw that weight around. I am happy by rubbing their noses in the fact they are being outsmarted by a girl......