Having problems with your 1996 Hyundai Accent ?

Sudden Power Loss on Highway, flashing "Check Engine" light

\015 My wife was driving our 1996 Accent (with the 1.5 liter 12-valve motor, 5-speed manual transmission and 185,000 miles on the odometer) on the highway and after travelling about 15 miles noticed a rather sudden power loss accompanied with a flashing "check engine" light. She was able to drive several miles, at greatly reduced speed, to a place where I was able to pick her up. When she parked the car, she had put the car in reverse to back up briefly and noticed a very strong burnt-rubber smell, which was still very noticeably present in the car when I came to pick her up later.\012\012The car still starts and runs, and even runs relatively smoothly, but will not reliably idle - one must give gas pedal pressure - and produces very little power. I have crawled under the car but I can find no evidence of burnt rubber, and the source of the smell is still a mystery to me.\012\012I had suspected that perhaps the timing belt had slipped a cog which accounted for the power loss, but upon inspection I noticed that the timing marks on the crankshaft and camshaft sprockets seemed to line up properly with their respective timing marks on the motor castings.\012\012Recently replaced (within the last year) are the crankshaft and camshaft position sensors, coil packs, and spark plug wires, as well as the alternator.\012\012OBD-II readout shows codes referring to random cylinder misfires as well as misfires on cylinders 2, 3, and 4. Cylinder #1 is not specifically listed. There is also a code referring to idle speed misadjustment and one pointing to an oxygen sensor circuit problem. At this time I cannot remember the specific codes; if need be I can reassemble all the parts so I can start the motor again and check.\012\012My list of suspects currently include a possible fuel pump failure or other fuel delivery problem or perhaps a plugged catalytic converter. Or it may be either oxygen sensor. But it might be a lot of other things as well. The car has long idled with a bit of roughness, especially when the motor is warm - is the idle control valve at fault? Etcetera. I'm willing to "shotgun" a fix but would like to start on what is more rather than less likely and is cheaper rather than more expensive. Any help would be appreciated to get me started on the right track.\015 Posted / edited by AnonymousUser on : 03-08-2020

Answers :

I must say that was quite a bit of info for the first posting of which I am grateful. Most questions are 3 or 4 words if that.
I guess my first question is how does the engine perform now ?
Have you drove it since you got it back home ?
The biggest hassle of driveability problems is the need to recreate the event in the shop. If you can't make the problem happen on demand, it is all but impossible to diagnose.
I would want to know what the trouble codes were/are, what the fuel pressure is, and where the smell was coming from to proceed.
There is a long list of possible causes.
My thinking would be to further inspect the converter as when this plugs up excess pressure can cause multiple cylinder misfires and as far as the burning rubber smell, when a converter is plugged the lack of flow causes a build up of heat closer to the exhaust manifold possibly melting something nearby to cause such an odor.
Repair Help & Product Troubleshooting for 1996 Hyundai Accent

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