97 Tercel cylinder misfire..........

Jan 08, 2007 12 Replies

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treesrcool 19 years ago

I've replaced the plugs, wires and coil packs............what's left?

I constantly have a cylinder 2 misfire.

I have had it clear up after replacing the coil pack on that cylinder for a week, but....it came back?!

Thanks

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Ray O 19 years ago

How did you determine that it is cylinder #2 that is misfiring?

Are the replacement plugs, wires, and coil packs OEM or aftermarket?

What was the condition of the spark plugs you removed? Was there any oil or gas on the electrodes?

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treesrcool 19 years ago

Hi, I used a code reader.Coils are factory parts, plugs are Bosch Platinum (double electrode). The plug in No. 2 looked fine.

Thanks

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Hachiroku 19 years ago

I used Bosch in my '95 with no problem.

Funny thing, about 2 weeks after I sold the car, it started having the same problem. I don't know if the new owner ever got it fixed...

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Ray O 19 years ago

So the code reader showed P0302? Can you feel any hesitation in the engine when driving?

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Stephen H 19 years ago

this is all I found directly on a toyota 4 cyl- I'd try swapping the injectors and see if the misfire moves.-- Stephen W. HansenASE Certified Master Automobile TechnicianASE Automobile Advanced Engine PerformanceASE Undercar Specialist Currently working at a Subaru Dealership

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, The toyota sets a code 303, immediatly after warmed up.Ignition system has been checked as stated before has newplugs, cap, rotor, and ign. wires. We checked the wave formsof the crank and cam sensors. all OK. Checked fuel system andinjector wave forms, all OK. Checked valve adjustment andcompression, all within specs. No vacuum leaks or othermechanical problems found. When perfoming a cylinder balancetest, the miss is barely noticed, but the scanner shows themisfires especially under a load.thanks for all the replies. This Toyota needed the #3 injector. As I said in my original post, itpassed resistance and wave form test perfectly. When i removedthe injector rail I did a quick volume test and visuallyinspected the spray pattern of all the injectors. Againeverything looked fine. I replaced the #3 injector with anoriginal Toyota part, the misfire and code were gone. Thenetwork came through again!

"treesrcool" wrote in message news: snipped-for-privacy@4ax.com...

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treesrcool 19 years ago

There is hesitation under acceleration, or load...example.. going up hill.

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treesrcool 19 years ago

Is injector removal on this model that involved of a job?

Thanks

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Ray O 19 years ago

See Stephen H's post about he cured a car with the same problem, differenct cylinder.

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treesrcool 19 years ago

Thanks for the input guys ! I'll look at the injectors.

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Ray O 19 years ago

You're welcome and good luck!

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Stephen H 19 years ago

Not my cure; something I found on a service I subscribe to; but it is the next obvious route. When I first got to this shop,. a tech was showing a lot car that had a misfire- he had disassembled it several times. It too turned out to be an injector. I wondered if I were doing the diag, I might have swapped the injector allot sooner.

Steve

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