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Bob,
Here are the explanations of the codes you're reporting:
They all point to a problem with ignition module 1 as it serves ignition coils A1, B2, B3 and A4.
Swop the plugs for the two modules on the firewall (the harnesses should be long enough) and see if the codes change to P1368 and P0352, P0353, P0355 and P0358.
If they do, it's the module. If not, then suspect a wiring or ECM fault.
A perfect example of leaking ECU capacitors in a 97. In the early year cars the ignition modules served separate sides and cyl 1,2,3,4 were on the right bank. Your ignition faults are for two on the right an two on the left, exactly the same as my 97. There are several companies the will test and refurbish the ECU. I used ASI, but that was many years ago, and others may have a better price and positive recommendations. Link:
Has anyone had experience with Module Repair Pro in Van Nuys? They say they will install an ECM repair kit in your unit for $149. ASI wants $1400 for refurbished unit. Makes it less painful if ECM is not the only issue.
Anyone have experience with this Code and has replaced the ECM with positive results? Other codes are PO351, 354, 356, 357
Perhaps a brief history will help with suggestions. Vehicle is 1997 XK8, excellent condition all usual problem areas have been addressed (Tensioners have been replaced) just not driven much lately, it has 54,900 Miles and sat in Garage on Battery Tender for 2 Years, It sat with a full tank of Gas for the 2 years. I needed a Smog Certification for Registration renewal and10 Year old Sears Die Hard died. I had AAA replace with a new Battery and I'm off to the Smog Check where it failed due to All data being erased not emissions. I was told to drive 50 miles or so at freeway speeds and then return and it would pass. I left the facility and stopped at a light a mile down the road and it died and would crank but not start. I had it towed to Independent repair facility thinking it was the Gas being old and gumming things up, they drained tank, replaced Plugs, Fuel filter, Air Filter, Replaced Oil & Oil Filter, Cleaned Injectors, Cleaned Fuel Lines. I drove vehicle home with no issues and 2 days later put the top down on a beautiful Saturday Afternoon in So Cal and got on the Toll Road to do a 25 Mile run at 80 MPH Plus and once again no issues. Parked the car for 20 minutes and started back home and within a mile it stuttered and stalled at a light. Started right up but it was not running smooth and check engine and reduced performance lights were going on and off. Not wanting to risk getting stuck on Freeway I decided to take streets home for 25 miles, putting into Neutral and revving Engine at every stop until we got home, it felt like it was pushing back. The Car starts up strong but after driving around my development and then idling for 30 minutes I got it to show check engine and run rough again and had it towed to shop where first inclination was Throttle Body but now after reading codes it appears to be ECM. Here's Dropbox Link to video of issue https://www.dropbox.com/sh/n18burvgb...B5L1Gv3Aa?dl=0
A perfect example of leaking ECU capacitors in a 97. In the early year cars the ignition modules served separate sides and cyl 1,2,3,4 were on the right bank. Your ignition faults are for two on the right an two on the left, exactly the same as my 97. There are several companies the will test and refurbish the ECU. I used ASI, but that was many years ago, and others may have a better price and positive recommendations. Link:
As I mentioned in my first post this is a common '97 problem due to leaking capacitors. What I did was remove the ECU (disconnect battery), shipped it to ASI. They tested it, confirmed the fault, and repaired it. I expect Module Repair Pro would do the same.
97 ECM issues crop up here fairly frequently and it's a case of 'when' rather than 'if', however your car thinks that there is a problem with ignition module #1 (P1367). The other four reported codes are consistent with this.
Swopping the connectors to the two modules will confirm or refute the car's self-diagnosis for $0 and allow you time to source a replacement if necessary.
ASI seems to be the go-to place in the US, but there's no mention of the test/repair service they used to offer on the website. $1,400 is expensive for a repaired unit, but they are getting harder and harder to source since the 97 ECM is unique to the XK8. Unlike some of the later versions, there is no crossover from the X308.
97 ECM issues crop up here fairly frequently and it's a case of 'when' rather than 'if', however your car thinks that there is a problem with ignition module #1 (P1367). The other four reported codes are consistent with this.
Swopping the connectors to the two modules will confirm or refute the car's self-diagnosis for $0 and allow you time to source a replacement if necessary.
ASI seems to be the go-to place in the US, but there's no mention of the test/repair service they used to offer on the website. $1,400 is expensive for a repaired unit, but they are getting harder and harder to source since the 97 ECM is unique to the XK8. Unlike some of the later versions, there is no crossover from the X308.
It’s odd that ASI is so expensive $1400.00 regarding a rebuilt ECU since they keep your old unit. All you’re paying for is labor to repair it. Module Repair Pro repairs your unit for $149 with a warranty. Quite a disparity yet ASI is in line with the Rebuilt Throttle Body.🤔
michaelh- the early 4.0 engines had cylinders 1-4 on the A bank, 5-7 on B. Bob is reporting misfires on 1,4,6,7. Two cylinders from each bank, so not ignition module related. That being said, I did switch on my 97 and the misfires stayed on the same cylinders, confirming the ECU problem.
Michael, thanks yes, the shop told me there were 2 on each bank that were coding. I’m picking up the ECU and shipping it to Module Repair Pro to get it repaired. 2 Day turnaround.and keep my fingers crossed. Thanks for your help.
It’s odd that ASI is so expensive $1400.00 regarding a rebuilt ECU since they keep your old unit. All you’re paying for is labor to repair it. Module Repair Pro repairs your unit for $149 with a warranty. Quite a disparity yet ASI is in line with the Rebuilt Throttle Body.🤔
So it's $1400 for an exchange unit? That's a big change from their previous offering which was to repair your old unit for a similar amount to what MRP is charging for the same service
Originally Posted by RJ237
michaelh- the early 4.0 engines had cylinders 1-4 on the A bank, 5-7 on B. Bob is reporting misfires on 1,4,6,7. Two cylinders from each bank, so not ignition module related. That being said, I did switch on my 97 and the misfires stayed on the same cylinders, confirming the ECU problem.
Here's the snip from the '97 Electrical Guide:
...showing module #1 serving 1 & 4 on 'A' bank, 2 & 3 on 'B' - or have I (literally) got my wires crossed?
I agree it's likely the ECM given the '97 track record - just seeking to eliminate the other possibility.
That wiring diagram shows that I was wrong all these years. Thank you. Switching connections and having the misfire in the same cylinders id obviously the best test.
I had the shop remove my ECU and I shipped it to Module Repair Pro here in SoCal and it arrived the following day (today) upon receipt they sent me an e-mail confirmation. Late this afternoon I received another e-mail indicating it was shipping back to me this evening. Being a skeptical former NYer I immediately called and asked if there was an issue because it was turned around so quickly. I was told it was repaired so quickly because their workload was currently very light. My fingers are crossed and hopefully this will solve my driveability issues and I won’t have to replace Throttle Body. The repair was $149 plus $25 to ship w insurance. If it works it’s money we’ll spent as ASI wants $1400 for a rebuilt unit. My 97 XK8 ECU
97 XK8 P1367 Code
