Great, thanks 😀

 

So more guesses. Bad battery. Bad alternator. Bad power/ground. Air leak (smoke test to find).

 

With the brake pedal being rock hard with the engine running (barely running) its possible that there is a vaccum leak between the intake and the brake booster?

I'm having a dispute with a car company I bought it from. They don't want to take it back.

 

I guess.

Sounds like you can reject it, I suppose there will be legal formalities but not my speciality. Trading standards / CAB / ...

 

I've only had it for two days lol...

 

If you keep the car - order an iCarsoft 930 code reader from eBay. They make a Jag one that can speak to the modules and actually get codes that cheap generic readers can’t get. Not expensive.

Regarding erratic acceleration I’d be looking at the throttle body or TPS or your coils. Regarding hard brakes check the vacuum line coming off the servo.

Keep at it mate! 👍

 

Thanks for that, I'll get one ordered! I just replaced the TPS and now it's fine again. Just need to figure out why it falls on its face over 4000rpm.

​While I'm here, there is another thing, there's a constant clicking sound coming from the ABS pump and when I press the brake pedal it gets louder and I can feel the pedal pulsing along with the click. Had a quick Google search but haven't found anything. Guess it's another one for the obd reader? Lol 😁

 

For what it’s worth, I’ve recently bought two early model 3.0 S-types, both running rough with poor acceleration and no power.
I replaced coils, plenum gaskets, IMT o-rings, lower breather elbow, cleaned the fuel injectors, new spark plugs, fuel filter. Both now run beautifully with fuel trims close to zero.
One needed a replacement throttle body and a used one did the trick, the other needed a new fuel pump because it had sat in a garage for years.

Maybe I just got lucky?!

The iCarsoft 930 definitely helped identifying problems.
Good luck!

 

Awesome, thanks for the info!

 

I uploaded a video just to give you an idea of what's happening, maybe I explained bad lol. This happens in any gear, and only under full throttle or if you take get the revs over 4.5k anything under that is fine. I have ordered an obd scanner but I just like to be interactive 😁 video link below. P.S. yes it's pretty high milage but the car is in fantastic shape. Cosmetically lol actually drives really tight and smooth too.

 

Hey guys, I got one of my obd readers working. Came up with one code P0430 catalytic converter system, bank 2 below threshold.

I would've thought if the cat is bad, wouldn't both be? Possible o2 sensor or what you think?

 

If DTC P0430 is present, the catalyst is not working correctly and was probably damaged by misfire(s) on that cylinder bank. In my experience, replacing the catalytic converter on the respective bank is the only way to eliminate P0420 or P0430.

When the condition you describe is occurring, does the MIL flash?

 

Thanks for the reply. "MIL" is that the check engine light? If so, it doesn't flash, just stays illuminated. I reset it and it will stay off unless I get the revs over 4500rpm, then it will illuminate again.

 

Yes, the Malfunction Indicator Lamp (aka: CEL, check-engine-light). If it's flashing during misfires, catalyst damage is occurring, thus P0420/P0430 DTC being stored.

 

Alright thanks. Well I've never seen it flashing, just a constant steady amber. So basically the only option is to replace the cat? Which should fix the issue with no power over 4000rpm. Well at least I know l, better replace both cats as the other one probably doesn't have much life left either.

Kinda strange, it had just passed the emissions test when I bought it.. Which was a few days ago.

 

Well now I'm confused. I cleared the engine light (don't ask why I knew it wouldn't fix anything lol) and after driving around for about 2 hours the car is still the same but the engine light hasn't returned!?

​​​​​​
Got a graph of the 02 sensor readings here if this makes sense to anyone lol

 

Hey guys last update on this thread, the car is now fixed. The problem was the catalytic converter on the left bank.

​​​​​​
I punched out all the inside of the cat, put it back and now the car runs amazingly well. Very happy. no check engine light either 🤣 i have ordered a replacement cat.

Hopefully this thread can be useful if anyone ever gets any symptoms I had.

Thanks to all of you for the help, had a good time interacting with you guys.

​​​​​​Take care all, I'll probably be back soon 😂

 

Thanks for the update, I've marked the thread resolved.
Those pesky codes came in handy in the end.
Hopefully the root cause of the cat damage has been resolved.