1999 Chevrolet Tahoe Repair Question
Asked on December 4, 2011
I own a 1999 cherolet tahoe with 184000 miles. I have had this truck for 2 years. After 6 mos. It developed a random misfire condition. I have replaced the distributor cap androtor twice, along with 4 sparkplug changes, plug wires, ignition coil, intake g
99 chevy tahoe with 184,500 mi. I have replaced the plugs, wires, cap and rotor, as well as the fuel injector upgrade being installed when I put in new intake gaskets. At around 170,000 mi. It developed a random misfire. The work I've listed was done trying to correct the misfire. Recently, it has been acting very erratically. It has always run worse in wet conditions, but now it has started to backfire badly at times. For instance, I changed the oil yesterday (mobil1, delco filter) and this morning I drove it. After about 10 min. of driving normally, it started missing out and backfiring to the point that it wouldn't stay running without me giving it gas all the time. After sitting for 10 min. I started home, with it still running badly. Unexpectedly, halfway home, it started smoothing out and running well again. I can do the work, but I cannot find the problem that needs fixed. Any ideas? I really need my truck to run, its my only vehicle and I can't afford taking it to a mechanic.
Replied on December 4, 2011
check your fuel pressure. this was one of the trucks that needed a harness change/pump change because of a problem with the harness near the tank. low fuel pressure can cause the problem you arehaving. also check your vacuum at engine idle. if it is 15" or below check for a plugged converter. fuelpressure shold be 60-66psi if a small block or 55-62 if a big block.
Answered by hmac300
17,961 answers provided