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07 Tahoe ran great then I changed the fuel pump and now it has a Miss in it. The check engine light blinks need help

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  • Cars & Trucks Master
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Count the number of times your light blinks, they are codes which indicate problems.

Posted on Dec 18, 2016

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1 Answer

07 tahoe new fuel pump now truck has a miss in it 68psi at fuel rail


What is your question and what problems other then miss do you have ? Have you checked for any codes in ECM ?

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hello my wife has came home and said she smell gas so started the truck and the sending unlt rusted out and pumped gas on the driveway. so i replaced the tank and the sending unit and also changed out all the lines and filter up to fierwall all three lines are from a kit and fit well. i reused the year old bosch fuel pump .the truck seams like the fuel pump is bad again.
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1997 Buick LaSabre 3.8 engine.


About the only thing that would make all 6 cylinders flood out is the fuel pressure regulator or a computer problem. You say you have checked the regulator, so the next step would be to check the injectors for a short to ground.

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My 97 tahoe the rpm's start going funny engine startes running like its missing popping and ******* and die's it has new fuel pump ,sending unit ,rotor,cap.cam censor ,fuel relay everytime i c


I'm assuming you replaced the fuel filter when you did the pump.
You'll have to try to figure out if you are loosing fuel to the injectors or spark to the plugs to proceed.
Its possible something is failing inside the distributor among other things.
I'm also assuming you have checked the computer for trouble codes.

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It sounds like fuel starved at higher speeds. i would change the fuel filter first if this does'nt help check the fuel pressure

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'07 Tahoe; check engine light on steady. Just came


Have a dealer or garage check your Oxygen (O2) sensor. As a quick fix, try disconnecting and reconnecting your car battery. Sometimes this will reset the check engine light.Good Luck!

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1 Answer

2001 Tahoe: Hard to start, idles rough, check engine light on.


Flashing check engine light is missfire, fuel pump probably causing multiple tries to start.Having to build fuel preasure,vac leak on one side of intake probably causing rich/lean condition.Also check back preasure to cat ,Sound like you are moving down right track.Mas air flow would probably set lean code bank1 and lean code bank2

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A tune up will not cure the lean code, in fact an engine miss gives a rich code from the unburned fuel. I would suggest u verify u have no vacuum leaks, also clean the inside of the MAF sensor if so equipped and replaced the bank two O2 sensor, that is the passenger side sensor before the catalytic converter. If u have the money replace both right and left sensors, it is better to do them in pairs.

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1 Answer

Engine will miss intermitently


This should set a check engine light. If it did, then get the codes scanned. If it was not severe enough to set a light, then you may have injectors sticking.

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