I'm having an electrical problem or fuel problem I'm going to replace both. I have a new fuel pump I just have to put it in and my gf is going to the parts store to get me an icm and coil. if that don't work then I'm going to replace my already somewhat new opti. My question is...
Iv read on some places online that certain opti's are for certain year lt1's. Now my car is a 93 with a 96 motor. Its running off a 93 computer and harness and has a 93 intake manifold. What opti should I use. if you can give me an knowledge about this area and part numbers it would be greatly appreciated. I know someones going to tell me to get an msd opti but I'm leaning more towards an stock factory replacement for now. Just so I can figure this bug out and be able to get this car off the front lawn and on the road. Thanks in advance for all your help.

-andrew

 

92-94 opti is different from 95-97,if you have a 96 motor then use a 96 opti.im guessin you have a crank sensor with nothing plugged in it correct?if so then you definetly have a 96 timing cover so you'll need the 96 opti.

 

You can save a ton of cash if you do some simple trouble shooting before throwing money at it, just saying.

Did you check your fuel pressure? Are the injectors firing? Did you check to see if you have spark?

 

To be honest idk if anythings plugged into the crank sensor. I really don't think anything is. The original motor was taken out years ago the the only thing I know that was swapped over was the intake manifold. I'm sure my opti is fine but ya never know lol. Thanks for your help.

 

No spark. One of the codes that popped up was 36. The car bucks and dies while driving and idles funny and dies after a few seconds. When the car dies it has trouble starting and most of the time won't start at all. I got it to start last night but died shortly after and I smell gas when I try to fire it back up. I have a fuel pump so I figures y not just put it in and freshen up my electrical. I read other threads on other sites of ppl having my problem and there answers we fuel pump, fuel filter, opti, icm, or coil. I don't have much time to do anything trouble shooting wise when I get home but I did put a spark tester in one of the spark plug wires and got no spark. So I figured if I freshin everything up and it still don't fix my problem then those are less things I have to worry about down the road. I'm just wondering if the opti has to be changed what one I would need.

 

That's cool, sometimes people will just start throwing cash and not doing any troubleshooting, but it sounds like you have that covered.

Good Luck

 

DTC 36 indicates a problem with the high resolution pulse signal from the optical cam position sensor in the Opti. Check both ends of the short Opti harness that connects to the Opti, for corrosion, damage to pins, loose pins, missing clip, etc. Hopefully when you installed a 96 engine with a vented Opti, you swapped out the short Opti harness, since the 93/unvented harness would not connect correctly.

I would also recheck for DTC 16 if it won't start, since that is the code for loss of the low resolution signal, and that shuts the fuel system down. In theory, it will run with DTC 36, but if its an intermittent/erratic signal, its not going to run well.

If you need a new Opti, you need a vented model (95-97) to work with your 96 engine.

 

Yea, it just sucks tryin to do as much as I can without actually having the car in front of me lol.thanks tho

I unplugged the top section of the harness to the opti and it looked all good. I wasn't able to check the bottom that plugs into the opti yet. Hopefully ill have a chance to do it today. I'm pretty sure the opti harness was changed cus it was running the cheapo $50 opti that was on the motor when we put it in. Then my friend bought a good opti but I'm not sure if it was vented. If he put a non vented opti and old opti harness in it could the car run? I believe after he put the opti in when u first start the car and u tapped the gas the car would almost stall but when it warmed up it was fine. Thank you for the info ill recheck the codes when I get home.

 

the opti is vented. it had 3k miles on it. OEM part. when i sold it to matt, he was already having some issues with the car. he said after he installed the opti i sold him, no real change in the crappy running. did i sell him a set of msd wires? txt me... later dillweed

 

Yes you did

 

Being as the car is a 93, you're correct, nothing will be plugged into the crank sensor. Any Opti from 95-97 will work. If you've got a code 36 and the harness is good, it's the Opti.

 

im gona check it out today cus i got time and ill be able too see