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[quote=”college man” post=104134]What was the fuel pressure when checked with the fpr
vac line unplugged and on? You may need to tape the gauge
to the windshield to see what the fuel is doing at that time
of problem. There is a fuel filter on that vehicle. fuel spec
is 34 psi at idle and 43 psi with the fpr line off. also the
plugs should be NGK double platinum tipped.PFR5G-11 What are
ST and LT fuel trims at idle and 3,000 rpm? what does the o2
voltage do at idle and the 3,000 rpm? Is the o2 going into closed loop?[/quote]okay, heres what happened ordered an ECU. replaced it and wala thats the problem :woohoo:
bad ECU. :woohoo: problem fixed, i sent the other one back for core[quote=”college man” post=104134]What was the fuel pressure when checked with the fpr
vac line unplugged and on? You may need to tape the gauge
to the windshield to see what the fuel is doing at that time
of problem. There is a fuel filter on that vehicle. fuel spec
is 34 psi at idle and 43 psi with the fpr line off. also the
plugs should be NGK double platinum tipped.PFR5G-11 What are
ST and LT fuel trims at idle and 3,000 rpm? what does the o2
voltage do at idle and the 3,000 rpm? Is the o2 going into closed loop?[/quote]okay, heres what happened ordered an ECU. replaced it and wala thats the problem :woohoo:
bad ECU. :woohoo: problem fixed, i sent the other one back for core[quote=”EricTheCarGuy” post=104029]You might want to check for leaks in the air tube that goes from the MAF sensor to the engine. Any leaks here can cause performance issues like you describe. Also, I know you say you checked the firing order but given that was one of the things that was done before the problem showed up, going over that work is a very good idea. More info here.
http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
Good luck and keep us posted.[/quote]
okay i found out this vehicle don’t have any trac control.
i put everything back did a smoke down test and i have no leaks. good vacuum with the vacuum gauge. also with a new MAF knocksensor/ new distributor.
i removed the cat converter and reved the engine. no power laggy problem still like it still wants to cut off. slugish.
i put everything back again and still no check engine light.
it still have the same problem it did when it came in.
im stuck i don’t know what else should i check.[quote=”EricTheCarGuy” post=104029]You might want to check for leaks in the air tube that goes from the MAF sensor to the engine. Any leaks here can cause performance issues like you describe. Also, I know you say you checked the firing order but given that was one of the things that was done before the problem showed up, going over that work is a very good idea. More info here.
http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
Good luck and keep us posted.[/quote]
okay i found out this vehicle don’t have any trac control.
i put everything back did a smoke down test and i have no leaks. good vacuum with the vacuum gauge. also with a new MAF knocksensor/ new distributor.
i removed the cat converter and reved the engine. no power laggy problem still like it still wants to cut off. slugish.
i put everything back again and still no check engine light.
it still have the same problem it did when it came in.
im stuck i don’t know what else should i check.i took off the top of the valve cover and i don’t see any loose parts or anything. what do i look. i will look into seeing the intake manifold gasket because the gasket is a plastic gasket thermal gasket i bought, but could that cause the engine to sound like a knock?
could the ICM be causing some sort of misfire that cause that loud knock sound? ive had a code CEL 15 last week. ignition output signal. and why are my cylinders spark plugs number 1 and 4 are not fouled looking
and only spark plugs 2 and 3 spark plugs are very fouled black and dirty carbon etc.i took off the top of the valve cover and i don’t see any loose parts or anything. what do i look. i will look into seeing the intake manifold gasket because the gasket is a plastic gasket thermal gasket i bought, but could that cause the engine to sound like a knock?
could the ICM be causing some sort of misfire that cause that loud knock sound? ive had a code CEL 15 last week. ignition output signal. and why are my cylinders spark plugs number 1 and 4 are not fouled looking
and only spark plugs 2 and 3 spark plugs are very fouled black and dirty carbon etc.