I think you guys can help me, engine starting problem
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 2,149
Likes: 4
From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
I think you guys can help me, engine starting problem
This pertains to my '87 IROCZ TPI car.
I've installed a 395 cu in stroker & a Pro-built tranny. The problem is that it wont start and I believe that its not getting any fuel to the cylinders. I may have pinched the wires in the 4 wire connector on the back side of the distributor.
I have 58psi fuel pressure. I have spark at the spark plugs. The plugs come out dry and there is no smell of gas even when #1 spark plug is removed and I crank for 2 minutes. Also, I check the ECM for error codes and get only the 1-2 sequence. The engine will only crank with not a single cylinder firing.
Knowing that this is a batch fire system and there are no other sensor to tell the ECM about crank rotation other than the distributor, does one of the wires in the 4 wire connector have to do with the firing (pulsing) the fuel injectors????
I have 'burned' Eproms for this car and have visited this board many times, so I know we have alot of knowledgeable guys here on the DYI Prom section.
I've installed a 395 cu in stroker & a Pro-built tranny. The problem is that it wont start and I believe that its not getting any fuel to the cylinders. I may have pinched the wires in the 4 wire connector on the back side of the distributor.
I have 58psi fuel pressure. I have spark at the spark plugs. The plugs come out dry and there is no smell of gas even when #1 spark plug is removed and I crank for 2 minutes. Also, I check the ECM for error codes and get only the 1-2 sequence. The engine will only crank with not a single cylinder firing.
Knowing that this is a batch fire system and there are no other sensor to tell the ECM about crank rotation other than the distributor, does one of the wires in the 4 wire connector have to do with the firing (pulsing) the fuel injectors????
I have 'burned' Eproms for this car and have visited this board many times, so I know we have alot of knowledgeable guys here on the DYI Prom section.
TGO Supporter
Joined: Jul 2000
Posts: 812
Likes: 1
Engine: 5.7L V8
Transmission: 700R4
Have you tried putting a noid light in the injector plug, or listening to the injectors to see if it's opening/closing?
What does your scantool say when the engine is cranking? Does your tach move?
According to this:
ftp://ftp.diy-efi.org/pub/gmecm/manu...9-165v8MAF.jpg
there is a distributor reference pulse HI/LO signal going to the ECM.
What does your scantool say when the engine is cranking? Does your tach move?
According to this:
ftp://ftp.diy-efi.org/pub/gmecm/manu...9-165v8MAF.jpg
there is a distributor reference pulse HI/LO signal going to the ECM.
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theshackle
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Mar 5, 2017 06:37 PM