1995 Sho Codes

[Reinovator]

Hello I'm most likely repeating this post or I'm brain dead when it comes to pulling codes. but hear goes. Recently I picked up a 1995 white in color SHO (I love these cars). It had been sitting for 2 years because the gentleman was tired of fixing it. I on the other hand enjoy being beaten to death by troublesome cars it seams (See Posts on my wife's SHO.)

Because of past fun problems with my wife's 89 and my 90 SHO (Never should have sold that Baby) I have had some interesting luck with these wonderful cars. I had been reading up on some post on the codes, and to me, I'm getting some different readings from what I understand. Engine off key on gen 1 is a two digit code and gen 2 is a 3 digit, or flash code. This is what I'm reading I preformed this 5 times with a "inova IEC code reader. Same results each time 565 565 121 421 4, My mind says What? That don't make sense. But I was born in the Sixties so there you go.

The car will run fairly good not perfect which I expected for 200k+ miles No smoking Strong Hesitates a little. To me that's to be expected and then it stops. Just stops. I can crank it a few times and it acts like Very Bad Timing. No power. if I let it sit it will not start, with out flooring it and cranking it then it will start. If I disconnect the Battery it will start idle a 1.5 then drop to 1.25 it has a new idle air valve but nothing else visible that I can see has been changed.

At 45hundred rpms it sputters a lot. I have found some loose vacuum lines. and have replaced or reattached them to no avail.

my wife's car had a very smiler problem and it ended up being the lower cam gear was slipping on the crank key. This doesn't seem to bee the case here. I do have another 1993 SHO which I picked up for parts (Sorry sold the bumpers and lights and Dash,Motor Blown. wish I hadn't, now I have this 95 Hind site).
Am I in the right ball part thinking this is just a TPS problem or am I in in the dugout.

 

[Reinovator]

Had to show Pics white is my 95 , The black one is my wifes 98 baby. Yes it will be painted this summer.

 

[rubydist]

Same results each time 565 565 121 421 4, My mind says What? That don't make sense. But I was born in the Sixties so there you go.

You almost got it right - it turns out there is a single flash between the "current" codes and the "stored" codes on the koeo test. Therefore, the correct separation of pulses yields: 565, 565, 214, 214.

214 is CID circuit failure, which is the cam sensor circuit - it could be an old code. it you have erratic tach function and/or random misfires/stalls, it could be the circuit is still having a problem.

565 is a hard fault in the pcm. this is serious and/or fatal.

the first thing I would do is to replace the pcm, and hope that the cam sensor issues go away at the same time.

 

[Reinovator]

OK Thank you.
PCM, let me try to remember what the heck that is. Ah Ok
and that one is located By the Radiator like on my Wife's 89? What years will the interchange any Ideas?
Or is it the ECM/ PCM like on my 93 In the dash/ fire wall. my 93 was a 3.2 automatic also.
This could work out if my 93's is still there.

 

[Devin]

The PCM is in the firewall, behind the glovebox. The box on the radiator is the IRCM. I don't think auto computers will work in a manual. Or maybe it is vice-versa?

 

[rubydist]

if it is an atx car, any of the atx computers will work. the mtx computers will not.

 

[Reinovator]

Ok Thank you.
ATX if referring to Automatic tranz? Or am Just guessing / Reaching
MTX is in reference to Manuel Tranz.
Interesting X.
YEA I'm OLD.

 

[Devin]

I was confused about dates of cars. I just realized the car in question is a 95, not an 89.

 

[Reinovator]

I was confused about dates of cars. I just realized the car in question is a 95, not an 89.

Hay Devin No problem. Some days I have to look at my Drivers License to make sure what my name is. No I don't drink, Sober for 27 years. Some times I think SHO's are my new addition. But that is for another Form.

 

[Reinovator]

Here's the one out of my 93 I need to clean up the pins a little.
Wish me luck!

 

[Reinovator]

1993 PCM installed
Codes are now565 565 1 212 214 212 214
my book says; 565 Canister purge solenoid
212 Loss of ignition diagnostic monitor signal/SPOUT circuit grounded
214 Cylinder Identification circuit Failure.

OK To me this sounds like an open or a ground in the Harness Near the Cam sensor, PCM, plug/ pig tail Area. or Not?

 

[Reinovator]

Here is a Suggestion I'm Going to Check next.
http://www.shosource.com/catalog/product_info.php?cPath=61_43_49&products_id=392
It Make sense, erratic Starting, Timing off, ETC. I will keep you all Up dated.

 

[rubydist]

I have seen the engine wire harness get open circuits in it for no apparent reason; in the cases I have seen, it was always on the rear side of the engine.

 

[Reinovator]

I have seen the engine wire harness get open circuits in it for no apparent reason; in the cases I have seen, it was always on the rear side of the engine.

The way it is now I'm willing to check everything!
Thank you.

 

[Reinovator]

I double Checked My other (93) That harness is still Good, no apparent breaks, If I need to I can go through it and look for Brakes, Opens, Shorts, etc. Am i looking for loose connections or bad plugs( pig tails)?

 

[rubydist]

I don't know, frankly - in the cases I've had that the easiest way for me to solve the problem was just to patch in a new wire from the 2 ends that I knew needed to be connected and carry on with life.

my guess would be that there are splices in the harness that have bad connections, but I don't know that for sure.

 

[Reinovator]

I don't know, frankly - in the cases I've had that the easiest way for me to solve the problem was just to patch in a new wire from the 2 ends that I knew needed to be connected and carry on with life.

my guess would be that there are splices in the harness that have bad connections, but I don't know that for sure.

Ok.
This is Good information, and don't even think I'm not Grateful. I like people who are up front and honest. I have had to deal with Poor wiring all my life Why should it change Now.
Poor May not be the best choice of words. But any time the Big three builds some thing like this they have a tendency to not use the best Quality. They do use good quality and proven ideas. the SHO is a Different bird.
Thanks again.

 

[Reinovator]

From every thing I know I decide to check the Timing belt. And to my Poor eye site It looks Off to me.





I did rotate the engine by hand 4 times befor rechecking cam marks and Yellow timing marks.

why I'm unsure. i haven't pulled down the front of the engine yet. My Oldest son's Birthday is tomorrow and getting things going for him is going to slow things down. I will post shots of the rest of the tear down later but for now this is where I'm at. on a side note my Shop manual shows a Hydraulic Timing belt Tensioner I don't remember this on my old (93 SHO), and my wife's 3.0 had a offset bearing system.

 

[luigisho]

Well, I've never had to look at timing marks- due to a belt skipping a tooth or two- so I don't know how things line up after it's run for a while. But I do remember cars running like crap after jumping a timing belt tooth. Might be worth your while to replace the belt and check the belt tensioners and the harmonic balancer-- it is a 2 piece unit that can separate over time. try running a search on the timing belt jumping a tooth and see what's archived on the board. I know it's been discussed several times

 

[rubydist]

looks like it is off one tooth. I don't think it skipped, I think the guy who put the belt on was not careful and got it off one tooth at installation. It will run remarkably different if the valve timing is off one tooth v. correct...