RicG

Hi All,Not sure if anyone can help me here…

My Corvette suddenly wouldn't start and as it turned out the small rotor button under the coil within the distributor cap had disintegrated. After seeing this, I replaced the distributor cap, coil and the rotor button. I still had no spark and on further investigation, I worked out that the pick-up coil was faulty. To replace this, you must remove the distributor. I have an OEM manual and followed this to the letter in terms of recording marks etc to ensure that the distributor and rotor were replaced exactly as they came out. I numbered all of the spark plug wires and ensured that they were all going to the correct cylinders in the correct firing order. Now I have spark but it's like the timing has just gone right out with backfiring and very rough, if you can, get it to idle. This is very frustrating considering I took so much care in removing and replacing the distributor. I'm now wondering if the control module might be at fault.

Does anybody have any ideas that could help as I've checked and rechecked to make sure everything is back as it was removed.

drive it

Sounde like it's either 180 off or just partially off. Start over-timing mark to TDC make sure it's compression stroke on number 1- and pull the cap-see where it's pointing.

RicG

Thank you. I was heading in that direction but, I was wondering if a bad Control Module could be an issue with this.

Incorvettei

I think you are 180 degrees off on your distributor

slammin

Before you start buying parts, you always start checking the last thing you did.

FostersPerformance

If it was 180 out, it wont run at all just backfire. Check what you did as mentioned above. Espically cyls 5 and 7. Easy to swap by accident.

ULTM8Z

Sounds like you might be encountering an issue I had with a replacement pickup coil

https://www.corvetteforum.com/forums...l-for-hei.html

auburn2

Time it with a timing light. Correct the timing first, if you don't do this you are just shooting in the dark. If timing is close and it is running and backfiring it is not 180 degrees off. If it is just backfiring while cranking it could be 180 degrees off.

If timing is good and it is still backfiring then trace your wires and make sure you don't have 2 crossed up

Around the top of the distributor starting with the first wire and going clockwise it should be 1-8-4-3-6-5-7-2

If you confirmed the wires are all routed correct, the timing is correct, and you are confident the distributer itself is good I would replace the wires and plugs. You could troubleshoot and try to find out what wire or plug are bad, but IMO it is just better to buy new as you need to replace them periodically anyway.