Hi, when the problem occurs, did you do any basic testing? Have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. You have to do testing when the problem is ongoing. Also, check for possible mil codes. You should be able to check mil codes by cycling the ignition switch. You just turn the key till the dash lites come on, no further. Cycle the key on--off, on--off, on, then the mil starts flashing, you count the flashes to get the codes, your looking for two digit codes.
Some of the national brand autostores used to loan out a fuel pressure gage if you don't have one. To visually test for spark at the plugs, you can pull a plug wire loose, stick known good plug or spark tester in the boot, ground metal part of plug/tester to metal part of engine, engine cranking, watch for spark.
Those relays you mentioned, we can check the wiring circuits if you want?
Sunday, May 2nd, 2010 AT 1:17 PM