Question about 1998 GMC Jimmy
I have a 1998 GMC Jimmy, 116K miles. Seemed to be hesitant to start for a while now, last week the truck started bogging down really bad (it wanted to go but didn't have power it seemed) did it three or four times before I reached my destination. Went shut truck off, went inside for about 10 minutes, came back out, started up fine, drove about a mile down the rd and came to a light, had to stop and truck stalled. Will not start again. I have changed fuel filter, fuel pump working fine. What's next?
My '98 started 'bogging' at lights.... intermittant hard starting in the morning. Fuel pump "sounded" great, but a fuel pressure check revealed that the pressure (that should remain pumped up) was bleeding off as soon as the pump stopped. When i replaced the pump, I found the feed tube for pressurized fuel had a hole worm in it from friction.(i.e. allowing pressure to bleed off). Check your pressure with the proper guage... if its not up to par.... the pump is bad. Good Luck! email@example.com
Posted on Nov 29, 2008
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Posted on Jan 02, 2017
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Dec 28, 2015 | Honda Cars & Trucks
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
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