i have a 1990 ford ranger 2.3 liter the 8 spark plug and it will start up fine then i will drive it for about 5 mins and then it will run bad
5

Asked by Angel Feb 01, 2019 at 04:20 PM about the 1990 Ford Ranger XLT Standard Cab SB

Question type: Maintenance & Repair

1990 ford ranger 2.3 liter the 8 spark plug and it will start up fine then i will drive
it for about 5 mins and then it will go to spitting and sputtering and backfiring
and when you give it gas it runs really rough and it backfires like crazy i have
replaced the computer and both coils and plugs wires and fuel filter

4 Answers
27,460

oilyspill answered 5 years ago

Battery has a full charge and connections all good? Any applicable trouble codes? The basics for a rough idle, check for a leak of some kind, fuel--egr--vacuum leak. You used a gage and checked proper fuel pressure? You have spark at all the plugs and fuel injector pulse? Check timing. Is it backfiring out the exhaust or intake? I can only help with testing.

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2002tremor answered 5 years ago

Look under the hood in the dark. Bad plug wires will give you a light show if they're arcing. How old are the plugs?

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