Asked on September 28, 2011
1997 Chevrolet Lumina Engine Problem with 220000 miles
Get Answer Now
Car No Start Injectors Not Pulsing
I did manage to start it once the other day using starter fluid & putting a little gas into cylinders my self and once car started it ran better than ever it seemed to have much more power old o2 sensor was bad and ran way to rich. But once I shut it off I could no longer start it. It seems that I dont get an intitial pulse from injectors but once it gets up to certain rpm they work. I have changed fuel pump, filter, ignition module coil packs and crank sensor.I have good fuel pressure good spark on all plugs I checked for power to all injectors and checked the resistance of all injectors about 12 ohms each. But did not get pulse with noid lite. I tried unplugging sensors and starting no luck there & not vats issue tried both keys and security light always goes off. More than 5 gallons fuel in tank. Not been able to restart with starter fluid. When I started it the first time I poured gas into every cylinder kinda hard to get to 1, 3, 5 now that its together and just 246 doesnt spin it up fast enough I thought for sure it had to be ignition module or coils sence it ran well after started so took back new module exchange for another one and no luck. They tested coils they where good.
ok! First you asked about codes and check engine light. It does work and it was not on when I got it started the other day and scanned good But now in my recent attempts to restart and unplugging sensors I had an arm load of codes but they where all from the sensors I un plugged and mifires on 1, 3, 5,
I checked voltage to both sides of fuse for fuel injector one side 12v the other.3 I tried it key on and while cranking no significant change.
I dont know how to check anything at pcm but another question would be does the pcm use a different ground or something for pulse after start I thought that because it ran well after start the pcm was fine I took it through gm recommened drive cycle all sensors came on all ok. Also If it is pcm and I buy one already programmed for vin does that mean I can just put it in and start it or is there some other issue with vats or what if I have a replacement transmission or something will that matter with a new pcm. I am trying to figure out if I could do this or if it would have to go to dealer. Are there pins on pcm that I could ck resistance to verify this?
Thursday, September 29th, 2011 AT 2:15 PM