Question about 1990 Oldsmobile Cutlass Calais

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Back fires through carbarator

My 1990 olds cutlas cilais back fires through the carb only when driveing but idels good would a vacom leak cause this ?

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I had that problem. the car would backfire and shut off. it turned out that one of the valves wouldnt close all the way, and it would backfire through the head. i dont know a lot about cars, but this was my problem. replaced one of the valves and it was fine.

Posted on Jun 23, 2008

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On a 1990 chevy with cruis control i changed plugs drove about 140 miles the next day it started to back fire thro the carb and cause a fire to start in carb what would cause this


Cross firing spark plug wires is the most plausible cause, did you replace them? If not do that and route the wires like the factory wires where and use spark plug wire looms if the old ones are missing or broken, this is very important. Any good auto parts store can sell you new looms or you can buy them on eBay Motors

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I start my engine on my 1990 oldsmobile cutlas ciera and when i give it gas it shuts off as if it gets choked up or something? Plz help


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My 1990 olds cutlas ciera stalls at red light, will start backup but stalls again as soon as put it in drive but can put it in neutral and will stay running until I put it back in drive and stalls again


The emissions controls, vacuum hoses etc are likely blocked up causing a lack of response from the engine when pulled into gear.
Most auto's have an anti stall device. There are several devices that need to be cleaned and or hose checked for blockage or wear/leaks around the engine/trans to determine the fault. Bear in mind this is a 24 year old car and may be just needing a little TLC.

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1990 ford 5.8 liter truck idels funny and kinda sounds like it is missing but spark plugs look great and new wires did nothing only has 67,000 miles


Could be a long list of things including dirty injectors or a leaking EGR valve.
The coil could be weak or the distributor cap and rotor may be shorting to ground. Has the fuel filter been replaced ?
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Does it happen all the time, only when you are accelerating, etc.

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My 1990 f150 302 5 speed starts up but wont stay idling unless i keep it running myself


clean the idle air control valve and pcv valve with spray carb cleaner. The IAC controls idle speed but gets gummed up. The pcv valve may cause a vacuum leak as well so clean or replace. And lastly clean the throttle bore and butterfly valve using an old toothbrush and some towels. Check the electrical connection at the IAC for security and corrosion and clean as needed.

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Some times my 1984 ford f150 idels fine when its in park(some times)but when i put it in drive or reverse idel drops about 500 or so rpm sputters for a little bit and then dies. Some times it runs fine...


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Coil wires all off coils on a 1990 Cutlas Ciera


For the 1990 Oldsmobile Cutlass Ciera.
Engines 2.5L and 3.3L included below:

For the 2.5L In-Line 4-Cylinder:
Firing Order:
1-3-4-2
Cylinders:
........(back)
1......2......3.......4
........(front)
Ignition Coil Connections:
(back)
...1
...4
...2
...3
(front)

For the 3.3L V6:
Firing Order:
1-6-5-4-3-2
Cylinders:
........(back)
2.........4.........6
1.........3.........5
........(front)
Ignition Coil Connections:
(back)
__
o <--1
o <--4
__
o <--5
o <--2
__
o <--3
o <--6

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Torque converter clutch is stuck on. Need to visit transmission shop unless you are experienced with internal transmission repairs.

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