1986 Coupe WON'T START
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
1986 Coupe WON'T START
So the last three days I finally had the time to replace my intake and everything above it. I changed the injectors, egr valve, egr solenoid, 52mm BBK, IAC, FPR, adjustable cap, all vacuum lines and more. I bought the plenum, large tube runners, and the big mouth intake from a member.I knew the plenum and runners were ported. I did not know the intake was until I had it off. My heads are stock.
The car starts and runs for about 10 seconds and then dies. I had a friend stop by at lunch with his computer to read what the car is doing. The computer says everything is fine. I set the new FPR to 43lbs according to John at FIC. I don't want to start ripping parts off yet.
Is the intake the problem???
Thanks again........
The car starts and runs for about 10 seconds and then dies. I had a friend stop by at lunch with his computer to read what the car is doing. The computer says everything is fine. I set the new FPR to 43lbs according to John at FIC. I don't want to start ripping parts off yet.
Is the intake the problem???
Thanks again........
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
Help
I had to go out and buy Fel-Pro performance gaskets to fit the ported intake. The gaskets fit fine on the intake. On the head they seated fine except they are a little bigger around the port because the head isn't ported. I triple checked that before reassembling anything.
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Team Owner
Joined: Jan 2003
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From: Summerland B.C. Canada
Checked all those ?
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
The IAC is new from GM but; I know that doesn't mean it isn't faulty. I will get a new IAC and double check the timing and plug wires 5 & 7. I am thinking IAC also.
thanks again guys....
thanks again guys....
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Was that FP with the vac line off & plugged?
Did you clean the IAC bore under the TB before inserting the new unit?
Did you mark the dist rotor position on the base before removing it from the engine?
Verify that the 9th injector base is sealing properly.
Did you clean the IAC bore under the TB before inserting the new unit?
Did you mark the dist rotor position on the base before removing it from the engine?
Verify that the 9th injector base is sealing properly.
Team Owner
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From: Freedom is never more than one generation away from extinction.
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Team Owner
Joined: Jan 2003
Posts: 20,275
Likes: 236
From: Summerland B.C. Canada
Don't go buying a new IAC just yet. You have a new TB that has never had the minimum idle set. You may want to adjust the minimum idle screw to open the blades and see if that gets you going. Also, you put the TPS onto it, did you set the voltage to .54 ?
Team Owner
Joined: Jan 2003
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From: Summerland B.C. Canada
Jr is talking about the setting the length from pintle to base. If it's too long, you will jam the pintle into seat and possibly damage it. They are usually set to a safe length when purchased, but always a good idea to check. My fuzzy memory says it's about 1.25".
Team Owner
Joined: Sep 2003
Posts: 20,170
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24