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98 oldsmobile misfire at low speeds

Misfire at low speeds

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How can I make the heat blow out hard in my 1992 Oldsmobile regency 98


What do you mean by blow out hard ? Does the speed change when you move blower switch from low to high . Or you don't have hi speed .

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What do the fuse relays under the hood of a 1998 oldsmobile 88 ls control


You have fuses and relays . The fuses are or should br labled inside each cover if still there as well as on the fuse block itself, If not I can look under the hood of mine and tell you. The relays from left to right thats passenger to driver and numbered including the empty spaces as mine hase three on the right and two on the left with three emty slots in between. Now Olds seems to have kept this araingement for some time also my '98 88 has ABS as part of TCS but no relays there and diferent climate controls over the years it is posible you have more or less than are presnt on mine the complete list is as follows
#1 - AC compressor control for the compressors clutch
#2 - Horn relay
#3 - AC blower fan motor on, at low speed on the '98
#4 - AC blower motor off or high speed depending on year, not present on my "98
#5 - ABS pump relay ,not present on my '98
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#7 - High speed cooling or radiator fan
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Feb 22, 2015 | 1998 Oldsmobile Eighty Eight

1 Answer

What is causing this? my 2001 alero has misfire on cylinder 1, i have changed plugs, switched coil packs, it doesnt seem to get up to speed. what is the problem??


The compression could be too low to create the bang it needs, I have seen it a lot, try the connecting wiring harness first it might just have a bad connection, but it does sound like low compression

Aug 29, 2014 | 2001 Oldsmobile Alero

1 Answer

Feels like miss firing at higher speeds


Your caption says misfires at high, then you say low? You have a 95. Lots of miles I assume. So there are several things that would cause misfires at high and low. First is timing chain/belt, sloppy. Second, would be the valves and rings. Valves worn or bent, not seating right. rings just worn out, not holding compression. Do a compression test and see. Low speed or idle misfires can be from vacuum leaks. check hoses. Low and high rpm misfires can be from ignition problems. Wiring, coil/s, ignition modules.

Apr 04, 2014 | 1995 Chevrolet Tahoe

2 Answers

98 passat code #1565 p1505 p0304


go to you tube and see if they have a video of this problem , put in search box your problem and out you tube on the end and it will take you to the video you need

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1 Answer

1999 Oldsmobile Alero Cylinder 2 Misfire


CYLINDER 2 MISFIRE COULD BE FAULTY SPARK PLUG OR WIRE AND COIL ,COULD HAVE A FAULTY CLOGGED FUEL INJECTOR, LOW COMPRESSION CYLINDER MANY THINGS CAUSE CYLINDER MISFIRE.

Sep 19, 2011 | 1999 Oldsmobile Alero

1 Answer

Misfireing at low rpms while traveling at highway speeds


That symptom is almost always ignition related. Occasionally a bad injector.

When was the last time you had a tune-up?

With the engine running spray the wires with some soapy water and look for sparks. If you see or hear arcing from the wires they need to be replaced.

May 07, 2011 | 1994 Oldsmobile Cutlass Supreme

1 Answer

I have a 2001 Olds Silhouette, when driving at speeds of 45 and up, it stutters. doesn't sound as if it's missing out, but the mechanic I took it to, couldn't figure it out.


These vans have a tight fit as far as the engine, they are not fun to work on but from what you discribe i would say it sounds like a sparkplug wire or two misfiring at times, check the sparkplug wires for any arcking dust, this will look like a brun residue, but its that or low fuel pressure at times but id say its more an ignition problem than anything, if there are no stored misfire codes then maybe hook scanner to it and drive as they watch the misfire counter on the scan tool, good day.

Apr 27, 2011 | 2001 Oldsmobile Silhouette

1 Answer

'98 Oldsmobile Silhouette-begins to surge at 2500 rpm and loses power. It is not the transmission but the engine begins running roughly, surging @2500 rpm when parked or when driving under a load. I have...


how about the sparkplugs and the wires, you may need to tune it up, sounds like it misfires under a load, i would start with a tuneup and go from there. the other thing that come to mind could be a bad coil pack, or low fuel presusre,if you have the computer scanned and pin point the cylinder or cylinders misfiring you could try switching coil packs or plug wires to see if the misfire move and if it does you would know if its a wire coil or plug, but if its been a while sence you had a tune up i would start with that.

Jul 15, 2010 | 1998 Oldsmobile Silhouette

1 Answer

Code p306 misfire on injector 6


Random misfires are usually caused by a leaking vaccum pipe, and will only be apparent at idle and sometimes at low engine speeds under part throttle.
Isolated misfires are usually caused by a faulty injector, coil pack, ignition lead, or low compression.

Well, you're going to have to check the spark plug,  spark plug wire, the coil pack, low compression, and the ignition lead, which only really leaves the injector, or even an intake leak at the offending cylinder. 

Start the engine and then spray intake spray or the like around the intake at the offending cylinder and see if the engine note changes. If it does, then you have an intake leak, otherwise, they need to check the injector in the offending cylinder. 

Good luck and hope this helps. It might just be time for a tune up: new spark plugs and wire or some fuel injector cleaner every fill up for now.

May 05, 2009 | 1998 Oldsmobile Eighty Eight

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