I have a 1990 TrooperII which has developed a complete failure of No.4 cylinder. The problem got worse and worse over a few weeks or so. I noticed a misfire (no engine trouble codes set in ECU) and replaced plugs leads distributor cap etc but still had the misfire. I ran the vehicle for about week then looked at the plugs. No.4 plug looks absolutely brand new, no deposits of any kind. However it is definitely sparking. All other plugs are fine. When I run the vehicle and disconnect plug lead No.4 there is absolutely no decrease in engine revs at all. Although there is definitely a spark at No.4 there seems to be no combustion whatsoever. I'm guessing the injector has died (or maybe the valves are stuck open, but there's no strange noises to suggest a dropped valve). I live in the middle of nowhere in central America and have no compression tester (only a multimeter and timing light). How can I check the injectors (and/or valves).
What do you think, thanks in advance for your time.
have the same problem?
Wednesday, August 23rd, 2006 AT 9:10 AM