Engine Performance problem
1988 Toyota 4Runner 6 cyl Four Wheel Drive Automatic
I have a problem with the engine misfiring and loading up. Although it starts properly, after about a minute it starts to load up (similar to the older carberated engines that wererunning with the choke still on) Once the engine has been run for a while (about 15-20 minutes) the problem diminishes but never goes away. If I push the throttle all the way to the floor, it will excellerate rapidely (normally). At about 3000 RPM an obvious smoothing/increase in power is heard and felt. Also, what may be a seperate problem, the engine runs obviously worse in damp wet weather with clear misfiring and backfiring. I do not have access to a code reader so cannot supply any codes that may be available. If this were an older carberated engine w/o electronic ignition, my first guess would be a two fold problem of an ignition shorting out, and choke not functioning incorrectly. However with fuel injection and computer controled ignition, I am at a loss without just starting to replace parts randomly untill I find the problem. The shop manual has not helped.
have the same problem?
Wednesday, February 10th, 2010 AT 4:50 PM