1990 Honda Accord Stalls and Backfires

HONDA ACCORD
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MONTA21
  • MEMBER
  • 2 POSTS
i own this honda accord '90, 290,000 kms on it. i had a broken exhaust system for last 3 months and just had it replaced. now it runs smoothly but after a while the engine starts to stall and gives a little backfire. my rpm goes down and it won't accelerate no matter how hard i press the gas padel. i have to press the gas padel on and off to keep driving and keep the rpm steady. after i shut off the engine i can smell a very strong odor, like a plastic burning.

please help me out. thanks in advance
Jun 14, 2006 at 11:56 AM
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CODY-ODY
  • ✓Experienced Mechanic
  • 57 POSTS
first check your tune up (wires,cap and rotor) next yuo may be experiencing a fuel problem or even a blocked exhaust (I say this in case your exhaust was open and you accumulated some debris in there before you had it repaired( can be checked easily by applying a vacuum guage to the manifolld at idle and seeing if the values are correct)
Also a fuel guage can be hooked up to the fuel rail and raise the idle untill the problem occurs (no too high ;no more than 2500 is recommended) sometimes a coil or igniter can cause intermittint problems as well' Good luck and I hope I was a bit of help to you!
Jun 16, 2006 at 11:18 AM
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Suggested Repair

Check the ignition tune-up parts (wires, cap, and rotor), then test for a fuel-delivery problem and a possible blocked exhaust from debris that entered while the exhaust was open. Use a vacuum gauge at the manifold at idle and a fuel-pressure gauge at the rail while raising idle to no more than 2500 rpm. Also consider an intermittent coil or igniter.

Conversation Summary

A 1990 Honda Accord with about 290,000 km began stalling, backfiring, and losing acceleration after a long-broken exhaust was replaced. The driver must pump the pedal to keep RPM steady and notices a strong burning-plastic smell after shutdown. The expert recommends checking ignition tune-up parts, fuel delivery, and a possible blocked exhaust, using vacuum and fuel-pressure tests, and considering an intermittent coil or igniter.

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