CHEVROLET SILVERADO ENGINE PROBLEM
1999 Chevrolet Silverado • 152,000 miles
1999 5.3 4wd auto. Engine idle fluctuates 500 rpm to 800 installed MAF ran good light stayed on for a long time then went out. In the morning wouldnt idle, was ok when warmed up then it started fluctuating agian sometimes between 500 and 1000 rpm then light came back on the code was P0104, P0174, PO102 and PO103.I replaced fuel filter, and fuel regulator. Truck does not stumble, lots of power runs great except for Idle. I disconnected the battery for 30 minutes when hooked up it was ok then next day started again so I disconnected battery again but this time, no change it started to fluctuate rihgt away. I checked for vacumn leaks the old way while engine was running I sprayed starter fluid around vacumn hoses to see if engine speed up but not much responce so I figure hoses are ok. Is it possible to check all the other sensors rather than replacing them all one by one. I am a good mechanical trouble shooter but with all these sensors Im lost. I need directions
February 13, 2013.
February 13, 2013.
Check out the related content below while we wait for the question to be answered by a professional mechanic.
1986 Nissan Stanza, California version. The engine wants to die when stopping. I thought that the lock-up switch for the torque converter was not unlocking. I have installed a used ...
2 answers • 1986 Nissan Sunny • 100,000 miles
1999 Hyundai Elantra mileage: 110,000. This car idles fairly well in neutral or park but very rough in reverse and drive. I just replaced the engine with a used engine and it is doing ...
1 answer • 1999 Hyundai Elantra • 110,000 miles
1988 Chevrolet Astro Van mileage: 247,000. It's time to replace the engine in my 1988 Astro. I bought a 4.3 V6 that has come out of a 1991 S-10. When I dismantled it to get it ready to ...
1 answer • 1988 Chevrolet Astro • 247,000 miles
1990 Toyota Camry mileage: 150,000. 1. The oil warning light is on. 2. There are four quarts of oil in the car. 3. The oil filter is dry. 4. The engine sounds rough. 5. There is noise ...
3 answers • 1990 Toyota Camry • 150,000 miles