Engine in 1997 GMC Safari acts like it is trying to start but
Never starts. Told could be plugs. Had plugs changed it started up brought home parked, got up next AM for work tried to start van no luck won't start. Replaced battery no luck. Engine turns but won't start.
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Re: Engine in 1997 GMC Safari acts like it is trying to...
Take off your gas cap and have someone stand there with thier ear at the hole, (no smoking), turn the key to on just before start and they should hear the fuel pump humming. if they dont then try to start. if it doesnt start turn key off and at that instant the pump should be heard again. What i think is happening is your pump is not energizing . Its supposed to energize when turning your key on and off. This can be caused by a bad fuel pump or pump relay switch. Hope this helps. please rate me
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Check the hard vacuum line as previously noted by others.
If that's ok, then take off the intake pipe and spray brake clean into the throttle body while trying to crank it.
If it starts.. then you have a fuel related issue, if it doesn't start then you have an electrical related issue.
Our van did not start after trying to use brake clean.
Take off the console inside the vehicle's cab and get at the distributor.
Usually people noted that the ICM (ignition control module, inside the distributor) was the main issue here, but on our van, the distributor and wires looked brand new so it was probably recently changed (we got this van 5 months ago), so I assumed the spark plugs were also changed at the same time.
We unplugged the connection from the coil to the distributor, tried to crank it, and no spark was being generated, boom, got a new coil and starts up fine.
Try changing the fuel filter and checking the fuel pressure at the shredder valve. The readings should be 60 to 65psi with the fuel line pressurized with the engine not running, once the engine is running. It should drop by 5psi. Start with the simple things first. Keep me posted, be glad to help.
sounds like water ingress to either a control module or the coil pack, check all control box locations eg footwells for water and then check the engine bay for loose or naked wires, dry and clean and possibly cover with a plastic bag etc and it should be fine.
Try cam and/or crank sensor. If crank to cam timing isn't detected properly it'll crank all day but won't start. I had similar problem on my 2.5L V6 Avenger....drove home fine, no engine light, next morning it cranked, but wouldn't start. The crank sensor was faulty.
My 1997 safari was doing the same. After being shut off for a short period of time it started as if it was flooded. If I put the accelerator to the floor it would fire up. As well, I had no engine codes to report. I replaced the fuel pressure regulator and everything is great. It was leaking fuel into the engine causing it to act flooded when starting. Once started, the computer system made adjustments for the leaking fuel so the engine ran fine. If you turn the van off and immediately try to start it, it should fire up. (don't give it time to leak extra fuel into the engine)