Question about 1991 Isuzu Pickup

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After hurrican sandy, I put some bad gas in the truck due to the gas shortage going on around here. This totally shot my system and I drained all the fuel and filled up when i could with a full tank of good high octane gas. From there i drove a clear and free 50 miles to my destination and my car sat for a few days. Got back in to drive home and the truck was losing power on the highways. I have changed the fuel filter and spark plugs and have been spraying carb cleaner but nothing has been working. O and i added gas treatment to the tank. Any ideas?

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  • 293 Answers

Have check your fuel pump?

Posted on Nov 09, 2012


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Posted on Jan 02, 2017

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SOURCE: Fuel Gauge reads empty, but tank IS full

the float in your gas tank seems to have water in it....water is heavier than gas, that's why gas floats on top of water....try putting something like HEAT in it to dry up the water in your tank....

Posted on Feb 03, 2009

  • 450 Answers

SOURCE: engine light was on and engine idles rough.

these O2 sensors are cat convertor check sensors. id be checking cat convertors and hopefully you should try replacing if not all ready is the front bank 2, O2 sensor
if you have scanner can you see fuel trims in data display to confirm high fuel trim only on bank 2 either +-5 or more indicates problem and if bank 2 sensor 2 has fixed high 700mv reading cat no good(warm idling)

Posted on Jul 10, 2009

  • 102 Answers

SOURCE: Isuzu Hombre pickup, 2.2L Vortec, Won't Start.

You need four things for an engine to run. 1. fuel 2. spark 3. compression 4. timing (spark at the right time. By your post it seems you have fuel and spark and you probably have compression unless you blew a head gasket. That leaves the timing. Check the timing and/or the timing belt or chain whichever you have.

Posted on Aug 07, 2009

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SOURCE: My 88 isuzu picup. How do I adjust the idle speed?

I just repaired my '94 and it had similiar problems. Too much fuel was flowing through the carb. Mileage dropped way off.

I rebuilt the carb but the real problem was a bent tang on the float. This resulted in the failure of the needle valve to close completely, regardless of the float level.

Posted on Dec 31, 2009

  • 279 Answers

SOURCE: lost power to engine

Check make sure all plugs are firing. Sounds like what my 93 Rodeo was doing-Idled okay but very rough when in gear. Turns out only 5 out of 6 plugs were firing due to a defective ignition module- 100 bucks later it works fine.

Hope this helps.

Posted on Mar 20, 2010

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