1991 Chevrolet Lumina - Answered Questions & Fixed issues

If cleaning the injectors got it running and not it won't start I'd look at something contaminating the injectors, try recleaning again and see if it starts, if it does clean the fuel system

check the o2 sensor wiring its grounding out or something is.

Clean the throttle body and maf sensors.

You can have a leak if is small put can stop leak if this not works you have a large leak.

On electronic fuel injection pumping an pumping an pumping the gas pedal does nothing without the engine running ! Pushing the gas pedal to the floor will cause the PCM - engine computer to go into clear flood mode . You have some very interesting ideas here , but not really how it works or is ! The vehicle will go into closed loop fuel control when the engine coolant temp reaches a definded temp an the O2 sensor get hot. She would run for a couple minutes and die which is open loop when running, closed loop is when the sensors kick and it would die. Pulled spark plugs, they were black meaning no spark. Can only be 2 Black spark plugs indecate a rich condition , over fueled , wet spark plugs indecate no spark .

Either you have bad weather stripping in one of the doors, or a bad heater core. Check all the stripping around the doors, and windshield. Does the car have heat?

Have you changed the battery

Cranksensor or ignition module !

Maybe a problem with instrument cluster? Usually the circuit works off resistance to ground. The sending unit in gas tank provides resistance to ground. The signal wire for fuel gage is a purple wire, if goes to fuel pump wiring connector. With key on, use digital multimeter, check for voltage. If no voltage, either problem with wiring circuit or instrument cluster. W/0 looking at instrument cluster, I don't know if you can replace gage itself w/o replacing instrument cluster? If voltage on the purple wire, ground it, while a helper watches the gage, if the gage starts reacting, then check the grounds for fuel pump wiring connector, if that checks ok, suspect the fuel pump sending unit has a problem.

Rerplace the speedometer cable as well as the speedometer,if it still does not work,chck the fuses!

Cant be sure but if its 91 its probably mechanical.check for cable going gearbox not wire cable probably inside cable broken or drive in gearbox

I may need your vin? Look on the backside of engine block, down low. May have to get under vehicle. Two wire connector, purple and yellow. If not there, check down by crankshaft pulley.

bet on the fuel pump and old filter

you will have to check for spark and fuel to see what is missing. then check for codes just in case there is one. then you will know what you have to check to find the problem.

What engine? If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

I think its mounted thru the block near the balancer

if it'S to change the timing belt . If I were you don't do it. it is very complicated to change.. if it is not right the damage to engine there is a hole process to install timing belt .Let technician do it hope it help

there should be a sticker with the firing order on it under your hood. if not its on your intake

Check for fuel pressure at the motor Check for spark or injector pulse Spark Plugs been in the motor more than 3 years, regardless of mileage ? Change them Battery any good ? Use the correct fuel,not a higher octane ?