digitaloutsider Posted March 7, 2007 Report Share Posted March 7, 2007 I vote crank sensor. I've seen numerous 3800's do the exact same thing. Quote Link to comment Share on other sites More sharing options...
1991luminaeuro3.1 Posted March 8, 2007 Author Report Share Posted March 8, 2007 What would be the best way to test the fuel injectors without one of those tester thing? Quote Link to comment Share on other sites More sharing options...
RJansen658 Posted March 9, 2007 Report Share Posted March 9, 2007 Not to be an ass, but it isn't the crank sensor. well, not to be an ass but... i'm going on what i have found myself. If i were there i would: check plugs/wires check to be sure they are pluged into the coils right use a timing light to see if all cyls are getting spark. remove/clean the IAC replace crank sensor ( i say that because i have spares to change with, and it is easy enough to get at on a 3.1) compression check Meant no offense, I too was speaking from my experiences. I am just pointing out, a compression test is free, a crank sensor isn't. It is hard to hear the car in the beginning of the clip, but from what you can hear at the end, its a straight dead miss. Crank sensors usually exhibit more erratic symptoms. I have found in the past, that a lot of time can be spent troubleshooting ignition problems, when there was a compression issue all along. Perhaps my wording was incorrect, but I meant no affront. What would be the best way to test the fuel injectors without one of those tester thing? You can rent them at AutoZone for a $40 deposit. Its a set of 6 or 8, one for each brand/type of the most common injectors. Find the one that matches your type of injector, unplug the connector from your engines injector and connect it to the NOID light, Have someone crank the engine or even keep it running and watch the NOID, it should flash quickly. Do this for each injector. Keep in mind that this is not checking the injector itself, it is testing the ECM's output to the injector, it will only tell you if the ECM, and related wiring is functional. To test the injectors, you will need a Voltmeter, prefferably a digital one. Commonly called a DVOM. Can get it at most auto parts stores for like $15. You will want to set it to measure resistance, there are a couple different scales you can measure resistance on, I'd use 2k or 20k Ohm setting. Really its just a way to break down the reading into smaller intervals for a more exact reading, use the setting that gives you the most exact reading. Unplug the injector, and take the two probes from the DVOM and touch them to the two terminals on the injector itself. It doesn't mater which way you connect them, reading will be the same. I've seen the correct resistance posted on the forum too many times to count, a quick seach should locate it. Quote Link to comment Share on other sites More sharing options...
1991luminaeuro3.1 Posted March 9, 2007 Author Report Share Posted March 9, 2007 Alright thanks everyone for the advice Quote Link to comment Share on other sites More sharing options...
1991luminaeuro3.1 Posted March 29, 2007 Author Report Share Posted March 29, 2007 Update: I got the car running it was the number one injector. Quote Link to comment Share on other sites More sharing options...
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