Question about 2001 Pontiac Firebird

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Early morning start up ''metal on metal'' sound from engine. Louder han the normal fuel injector clicking sound. Oil presure jumps from just under 40 to 45 44.000 miles

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Oil pressure looks ok for start up, maybe a little low.

You can not hear the fuel injectors clicking without a stethescope, you are probably hearing the lifters.

You may want to clean your oiling system by using some sea-foam or equivelant and see if that doesn't help.

Posted on Sep 29, 2009

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Oil pressure is fine, sounds like carbon and gum build up on piston rings or vavle guides. try some engine restorer that pours into oil, like wynns.

Posted on Sep 29, 2009

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I have 2006 f350 diesel it acts like it's not


wow....the sky is the limit here....i LOVE the 6.0, it pays my bills :)....with that said..there are many possiblities, almost too numerous to speak of...first, i assume you can hear the fuel pump?..try opening the upper fuel filter housing and turning on the ignition key, if filter bowl fills, good!...when you crank it, is it cranking above 500 rpm? thats the minimum needed to start, make sure batteries are strong. when cranking, can you see the oil presure guage rise? does it have the right oil in it? your fuel injectors are driven by high presure oil, without base pressure (what your dash guage would read) the high pressure system has no oil to drive injectors "power stroke". if you have base pressure you really need to have a computer on it to monitor high presure oil when cranking, will need 500 psi just to fier then would jump up from there...it is also possible the FICM, or fuel injection control module has failed..this too needs to be tested with computer, needs to read internal voltages to make sure has45 volts..now the ficm may be covered under emission waranties still...that truck did come with a 5 year 100,000 mile warranty on engine and some componetns are 6 years, based on state sold in...back to the high pressure oil system, in 06 the vehicle had awhat called a snap to connect fitting, or STC. that connects the high p[ressure oil pump to the branch tubes that supply oil to the injectors..that too can seperate with age and cause a no start...it would be in your best interest after chdecking the basics to see you dealer...in comparison the initial diagnosis would be cheap (in comparison) and effective if trying to repair on your own...it will save you much hair on your head!! good luck, hope this helps you...very hard if not impossible to diagnose these without compuiter on it!

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I have a 2004 dodge ram 5.7 liter . O have difficulty starting my truck. Some times it starts fine but other rimes I have to pump the gas and wen it starts a small amount of smoke comes out.truck runs...


I have seen two different problems with symptoms like this. 1. A leaking injector. If one of the injectors is leaking a small amount through the pintle on the end of the injector it will bleed the fuel system presure off and dribble fuel into the cylinder, fouling that cylinder. When you try to start it the fuel that has pooled into the manifold will create smoke when it does start. And since the fuel pressure has bleed off to zero PSI in the fuel supply lines it will need time for the fuel pump to recover the system up to normal operating presure. Presure testing (bench test) of the injectors is needed to verify this. 2. A bad fuel pump, relief valve, or bleed-back check valve will bleed the fuel system presure off while it is sitting. To find out if this may be the problem a fuel presure guage set needs to be installed and then run the engine, verify the operating presure is normal, and then shut the engine down and watch the fuel pressure for exessive drop.

The leaking injector is more apt to create the smoke when it fires up, but both can cause this. I would start with check #2 first. Of course there are many other things that can cause symtoms like this but these 2 are the most likely causes.

Hope this helps, if you have any further questions just ask!

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3 Answers

1991 Nissan Maxima has trouble starting on cold mornings. Once started in the morning, it usually has no problems starting throughout the rest of the day.


Probably the o-rings for the injectors are leaking-this will cause fuel under pressure to leak into a static cylinder, when you try to start it the plug is wet with fuel and the car will be difficult to start. They are pretty easy to replace on early 90's Nissans.

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The oil pressure is supposed to increase when accelerating and come back down when idling. Try replacing the fuel filter and see what happens but the oil pressure has nothing to do with it.

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Tapping noise under valve cover


SOUND LIKE WORN LIFTERS OR HYDRALIC LASH ADJUSTER NEED ADJUSTING OR OIL COULD BE DIRTY NEED CHANGING.CHANGE OIL FILTER AND CHANGE ENGINE OIL.USE RIGHT OIL VISCOSITY USE OIL NOT TOO THICK.USE 10W -30 OIL ADD BOTTLE LIFTERS CLEANER OR QUIETNER TO OIL CRANK CASE DONT OVER FILL CRANK CASE.IF LIFTERS STILL NOISEY THEY COULD BE WORN OUT.

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My van just stopped all of a sudden-when I tried to start it up it sounded like it was going to start, but even with a jump it wouldn't start and my oil light came on but I have oil in it. What does that...


do u know if it has oil presure? the motor might have shut down if it lost oil pressure, it could also be the fuel pump? is the check engine lite on?

Jun 04, 2010 | 2004 Chrysler Sebring

2 Answers

Injection fault light comes on.


i would advise you take to a garage to have fault codes read. this could be a number of things. eg mass air flow meter, to catalytic converter. The best way to sort this is by interrogating the engines ECU.

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