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Fuel too rich


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BillHillyBob
New User

Sep 20, 2018, 8:55 AM

Post #1 of 6 (213 views)
Fuel too rich Sign In

I have a Dodge Dakota 2000 with a 3.9L fuel injection engine with automatic transmission.

I have installed a factory refurbished engine, had the transmission rebuilt. Have replaced all of the sensors, fuel pump, injectors, spark plugs, wire distributor, rotor, coil, alternator and AC compressor. The intire exhaust system has been replaced, cat, muffler and tail pipe. The CPU has been replaced and the was checked by the dealership that it had new updates.

The truck ran great for the first two months then began having trouble with fuel too rich. Received a code fuel bank one too rich. To start it you have put the peddle on the floor. No power on take off but you have to put the peddle on the floor to get it to go. Runs very rough and the smell of gas comes from the exhaust. Pops through the exhaust too.

I have taken this truck to serveral local mechanic shops to include the dodge dealership. They have conducted compression tests, vacuum tests, checked the spark and timing both are perfect as they put it. They all say that the truck should run great and they are at a loss.

Anything that is being missed? Help!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 20, 2018, 7:26 PM

Post #2 of 6 (201 views)
Re: Fuel too rich Sign In

This really isn't rocket science and any good tech should be able to diagnose this. The first thing i would do is monitor the fuel pressure and see what happens to the rest pressure when the engine is shut off.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



BillHillyBob
New User

Sep 20, 2018, 8:45 PM

Post #3 of 6 (196 views)
Re: Fuel too rich Sign In

They already done that. They say the pressure is where it is supposed to be. Fuel pressure is good the compression is good and the have conducted a vacuum check on the engine block and through the vacuum lines.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 21, 2018, 2:53 AM

Post #4 of 6 (193 views)
Re: Fuel too rich Sign In

I didn't ask if the fuel pressure was good. I said to check the rest pressure to see how quickly the pressure drops off when shut off.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



BillHillyBob
New User

Sep 21, 2018, 7:30 AM

Post #5 of 6 (182 views)
Re: Fuel too rich Sign In

Ok. Didn't really understand what you were saying. I well that checked out


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 21, 2018, 8:07 PM

Post #6 of 6 (170 views)
Re: Fuel too rich Sign In

And what were the results?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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