Question about 1998 Isuzu Trooper

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Feels like the car being starved of fuel

My problems is that when you driving it feels like its being starved of fuel and holding back. it had a recall letter about the injectors but they said they were not the batch they were looking for .can you shed some light as my machanic has no idea what it can be he has had my car for 6 weeks and is stook.

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Fuel filter clogged.. cheap replacement fix. or fuel pump not putting out correct pressure expensive fix. go to Autozone purchace a can of Sea Foam $10 and pour in 1/2 can to 1/2 tank of gas and drive it around from a half hour see if this wont clean up the clogged injectors.

Posted on May 06, 2010


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I would have my fuel pump checked and a pressure test done on it to see how much pressure it is putting out also would check all the filters to the fuel filters and the air filters.this could be your problem starving for fuel. hope this helps,

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My jeep is driving fine, but it starts very hard in the morning - I have spent so far almost $2,000 in various parts at the dealership, but the problem is still there. Any suggestions?

If you would share with us all that was done , it may help us to diagnose the problem more efficiently.

I spend $2000 at the dealership , doesnt help much.

My first gut feeling is going to be a fuel pressure leak... overnight the fuel pressure could leak down... and cause the engine to starve for fuel durring morning start up.

You can check this by doing the following next time you do your morning start up proceedure.

Turn the key on , but do not attempt start the vehicle yet.
turn the key back off.
turn the key on... until you hear the fuel pump pressure has built again.
turn the key off. and then back on ... and after the pump stops... try to start it.

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Starving for fuel sometimes I changed the fuel filter but problem persists. I'm thinking it may be a vacuum problem to the fuel tank. Thoughts? Russ

well there can be a few things that cause this
first off if this was in my shop I would check the fuel regulator this allows fuel back into the tank from the fuel rail so that you dont over pressure the fuel rail, if it is leaking past then this will starve the engine for fuel, also note that if your EVAP system onthe fuel tank is not working proporly the check engine light will come on there are sensors in place to worn you of a problem there and this will not starve your engine for fuel, if its not the regulator then its a fuel pump, only way to tell is to put a fuel pressure gage on the rail and drive the vehicle till it acts up and see what the pressure rating is at most newer vahicles require arround 50 plus PSI if below that you have a pressure problem and need ot possibly replace regulator on the fuel rail... if you need more help just replay ill check in later

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AS far as IAC goes, you would probably experience stalling at lights, on turns , anytime engine under load like AC on at stop. TP sensor? Maybe, but is easy to check with an ohm meter. I'm sure you have checked all brakes for possibly holding on slightly. You have checked throttle pedal & linkage to make sure pedal down all the way, is opening throttle all the way? Does it feel at all like it's holding back, or just starving? Any good tranny shop that could check torque converter for proper operation in your area? One other idea would be to join free, at ( and post there, as that would be a spot where all or a lot of guys with same vehicle may be able to shed some light on it for you.

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