1995 corvette LT1 - code 36
Thread Starter
Intermediate
Joined: Sep 2003
Posts: 30
Likes: 0
From: Round Rock TX
1995 corvette LT1 - code 36
The car starts fine until it warms up and then stalls. Next time it will not start until several tries and then the "check engine" light comes on but the car runs fine and the cycle starts all over again. I had the code checked and it was code 36. Coil has been replaced and same issue. Please help !
Thanks,
Bobby
Thanks,
Bobby
Melting Slicks
Joined: Apr 2000
Posts: 2,408
Likes: 3
From: Bel Air Md
DTC 36 is faulty high resolution pulse or extra low resolution pulse detected. 
The referance signals toggle between 0 and 5 volts as the camshaft turns. Therefore, an open,a short to voltage,a short to ground , or a defective sensor inside the distributor can prevent the voltage from pulsing at the EMC. Took this right out of the book, it's all Greek to me. 
Sounds like the opti is on the way out.
The referance signals toggle between 0 and 5 volts as the camshaft turns. Therefore, an open,a short to voltage,a short to ground , or a defective sensor inside the distributor can prevent the voltage from pulsing at the EMC. Took this right out of the book, it's all Greek to me. Sounds like the opti is on the way out.
Thread Starter
Intermediate
Joined: Sep 2003
Posts: 30
Likes: 0
From: Round Rock TX
So, should I replace the distributor and the water pump, since it needs to removed to get to the distributor. What brand should I use for both and how much do they cost ?
Thanks,
Bobby
Thanks,
Bobby
Melting Slicks
Joined: Apr 2000
Posts: 2,408
Likes: 3
From: Bel Air Md
You did not say what mileage is on your car, however, the added expensive of a water pump is well worth the investment. If you just do the opti, and the pump fails a month later, chances are it will take out the new opti. I don't know what brand to recommend. I'm sure someone will tune in on that question.
Le Mans Master
Joined: May 2005
Posts: 7,354
Likes: 2,278
From: Central Maryland
Originally Posted by HG
You did not say what mileage is on your car, however, the added expensive of a water pump is well worth the investment. If you just do the opti, and the pump fails a month later, chances are it will take out the new opti. I don't know what brand to recommend. I'm sure someone will tune in on that question.
For the Opti, I'd go with either a fresh OEM unit, or the DynaSpark if you'd rather go with the best you can get.
Also consider swapping all coolant hoses, plug wires and the serpentine belt while you're in there, unless they're fresh. There'll never be an easier time to do them than while you've got it pulled down as far as is required to get to the Opti.
Be well,
SJW
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Thread Starter
Intermediate
Joined: Sep 2003
Posts: 30
Likes: 0
From: Round Rock TX
I need a good mechanic in Austin, TX to do all this work, and won't rip me off. (I will buy the parts and just need him to install all - optispark, waterpump, hoses, wires, plugs etc...)
Thanks,
Bobby
Thanks,
Bobby
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
First check the connections at the opti. Make sure they are good, clean, and tight and a FSM will help with the voltage readings for testing purposes. After you do this disconnect the battery for ~30 sec and then reconnect and start the engine. If the code reapears then you know the optispark is toast.
