1995 CPI no start-have fual pressure and spark random NOID test

actionpaintball · 06-17-2006, 10:23 AM

1995 Jimmy 4.3 auto CPI. I have 62+ psi fuel pressure on the test rail. Recent new fuel pump and filter. Starts and stumbles with ether for a few seconds-appears to have string spark. I hooked up a noid light and I iwll get a few strong blinks and then nothing when cranking. Stop for 10 seconds and repeat cranking-noid light does not blink-so it appears that I have an erratic fuel injection pulse.

Additionally-no check engine light and no pending codes. No apparant washing by the fuel reglator...

Can any other sensors cause a no start without throwing a code?

How often to ECM's fry?

Where do I go from here?

Thanks
Tim

wilfie27 · 06-18-2006, 12:34 PM

The low oil pressure relay in the back of your glove box will cause it not to run. There are two relays there, one for your fuel pump and one for your oil pressure sensor. You can switch them ( they are the same) and listen if your fuel pump is working to see if the relay is bad. This may not be the answer but I'd at least try it.

rlith · 06-18-2006, 01:29 PM

If you have the ECM on the coolant bottle, check your crank sensor at the base of the timing cover...Did you remove the distributor at any point? Have you check rotor/cap/wires?

actionpaintball · 07-14-2006, 11:03 AM

OK-update and still not starting. New crank sensor, new Ignition control module. It will still start with ether and run rough. 62 PSI on fuel rails and sporatic noid light test.

ECM?

rlith · 07-16-2006, 08:54 AM

Quote: Originally Posted by actionpaintball

OK-update and still not starting. New crank sensor, new Ignition control module. It will still start with ether and run rough. 62 PSI on fuel rails and sporatic noid light test.

ECM?

Your computer...

06-17-2006, 10:23 AM	#1
actionpaintball Registered User Join Date: Jun 2006 Posts: 3 Location: User is: OffLine	1995 CPI no start-have fual pressure and spark random NOID test 1995 Jimmy 4.3 auto CPI. I have 62+ psi fuel pressure on the test rail. Recent new fuel pump and filter. Starts and stumbles with ether for a few seconds-appears to have string spark. I hooked up a noid light and I iwll get a few strong blinks and then nothing when cranking. Stop for 10 seconds and repeat cranking-noid light does not blink-so it appears that I have an erratic fuel injection pulse. Additionally-no check engine light and no pending codes. No apparant washing by the fuel reglator... Can any other sensors cause a no start without throwing a code? How often to ECM's fry? Where do I go from here? Thanks Tim
	[Reply w/Quote]

06-18-2006, 12:34 PM	#2
wilfie27 Registered User Join Date: Jun 2006 Posts: 6 Location: User is: OffLine	Re: 1995 CPI no start-have fual pressure and spark random NOID test The low oil pressure relay in the back of your glove box will cause it not to run. There are two relays there, one for your fuel pump and one for your oil pressure sensor. You can switch them ( they are the same) and listen if your fuel pump is working to see if the relay is bad. This may not be the answer but I'd at least try it.
	[Reply w/Quote]

06-18-2006, 01:29 PM	#3
rlith Insane Network Engineer Join Date: Dec 2002 Posts: 5,965 Location: Pittsburgh, PA. User is: OffLine	Re: 1995 CPI no start-have fual pressure and spark random NOID test If you have the ECM on the coolant bottle, check your crank sensor at the base of the timing cover...Did you remove the distributor at any point? Have you check rotor/cap/wires?
	[Reply w/Quote]

07-14-2006, 11:03 AM	#4
actionpaintball Registered User Join Date: Jun 2006 Posts: 3 Location: User is: OffLine	Re: 1995 CPI no start-have fual pressure and spark random NOID test OK-update and still not starting. New crank sensor, new Ignition control module. It will still start with ether and run rough. 62 PSI on fuel rails and sporatic noid light test. ECM?
	[Reply w/Quote]

07-16-2006, 08:54 AM	#5
rlith Insane Network Engineer Join Date: Dec 2002 Posts: 5,965 Location: Pittsburgh, PA. User is: OffLine	Re: 1995 CPI no start-have fual pressure and spark random NOID test Quote: Originally Posted by actionpaintball OK-update and still not starting. New crank sensor, new Ignition control module. It will still start with ether and run rough. 62 PSI on fuel rails and sporatic noid light test. ECM? Your computer...
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