Injectors pulse light when attached so they are tripping Spark testor sparks so I am getting spark Tachometer registers so ckp sensor seems to be working its not the security system as that activates after engine is running I am getting fuel (line has pressure)
Kinda pulling my hair out here over this. I traced all my wiring and that seems to be ok, everything is getting voltage that it should.
Just turns over and over and nothing...
Any ideas on where to look next?
I ordered an autotap to see if that can pinpoint something but until that gets here does anyone have any ideas.
It ran fine, pulled into garage, next day no start.
thanks in advance for ANY ideas.
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09:18 PM
PFF
System Bot
$Rich$ Member
Posts: 14575 From: Sioux Falls SD Registered: Dec 2002
Plugs looked ok. I haven't pulled them out tonight to check to see if they are wet or not. I have been messing with this for three weeks now, so it is not as if they have flooded (can that even happen anymore with fi cars?).
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09:33 PM
$Rich$ Member
Posts: 14575 From: Sioux Falls SD Registered: Dec 2002
Sounds like you have spark. Need to verify fuel INJECTION. What is fuel pressure? have you got a scope or a Noid light to see if the injectors are actually getting a signal to fire? Have you checked power to injectors? (fuses?)They are ground controlled so with key on you should have battery voltage to one of the wires. Just unplug and probe the connector with a multimeter ( or test light if you must)from terminals to ground, one wire should have power. If so you need to go further checking grounds etc...
Hope this helps
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11:38 PM
Oct 3rd, 2003
fieroX Member
Posts: 5234 From: wichita, Ks Registered: Oct 2001
My car has done this a few times in the past, and I could never pinpoint exactly what was going wrong, just suddenly one day it stopped and hasnt done it since. Try resetting the pcm (unhook both connectors that go to it for about 20 minutes) and plug it back in. Then give it a try and report back. Always worked for mine.
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01:26 AM
StansGT Member
Posts: 914 From: Schoolcraft MI, USA Registered: Jul 2001
Be sure that all your wiring to the coil pack and Ign module is soldered correctly, im sure you've checked it, but if your cranking your engine and something is partially connected or has a bad connection in that harness, it will cause it to start one day and stop, or stop when you mash on the gas, or stop out of the blue, or stop when ever it wants. You can even shake it, and it will not effect the running of the motor, but it just takes one stretched out wire to change, and BAM! it stops...
Make sure none of it is wet either,,,,,, can anyone say..... Fiery fiero three times fast...
Try a shot of ether to make sure you're getting fuel. Kevin
------------------ 85 Fiero-based ASPP GT-40 MarkII. 3800 S/C, Auto, Held suspension all around with 2" drop spindles and sport fr. end. RCC bump-steer correction. Mr. Mike's interior.
Is your battery fully charged. My Astro van gave me problems one year and the service tech said the newer fuel injected cars have to turn over fairly fast or they won't start. I just had this problem with my 4.9L swap. The motor turned over pretty good I thought but it wouldn't start. I had gas and spark and air but no go. I fully charged the battery fo 24 hours and tried again. I hadn't changed anything but it started right up.
If you're running a 98+ PCM, you may want to look into having a 'CASE LEARN' done to the PCM. Seems that there's a problem when swapping PCM's between motors. It has to do with the exact placement of cam & crank sensors on any given motor. Symptoms are as you describe.
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12:23 AM
Rickady88GT Member
Posts: 10648 From: Central CA Registered: Dec 2002
Got her to run today and am almost embarassed to say what was wrong. Wired the spark plugs exactly incorrect side to side. Amazing how poorly they run like that. Stupid mistake that once done I never thought to recheck. Good lesson to always recheck the simple stuff first (shakes head at my own silly moments that I have).
Anyhow, thank you one and all very much for the help.