Mack4194 Posted September 28, 2011 Share Posted September 28, 2011 I have no injector pulse while cranking. I have replaced my distributor which is under lifetime warranty. This did not solve my problem. My question to you experienced gentlemen is what makes the injectors pulse while cranking? Any help is appreciated. Thanks Guys Mack Link to comment Share on other sites More sharing options...
jimoshel Posted September 28, 2011 Share Posted September 28, 2011 What year? Which engine? Link to comment Share on other sites More sharing options...
Geonovast Posted September 28, 2011 Share Posted September 28, 2011 A bad CPS will also cause no injector pulse. Do you have spark? Link to comment Share on other sites More sharing options...
Mack4194 Posted September 29, 2011 Author Share Posted September 29, 2011 Sorry bout that, It's an 89 4.0 manual trans. I have spark. It will run after I spray propane in the intake to start it. But it doesn't run well when I give it much gas. I have to baby the throttle otherwise it bogs out. Link to comment Share on other sites More sharing options...
HOrnbrod Posted September 29, 2011 Share Posted September 29, 2011 How did you test and determine you had no injector pulse while cranking? Noid Light? Have you checked your fuel pressure with a gauge yet? Link to comment Share on other sites More sharing options...
Mack4194 Posted October 1, 2011 Author Share Posted October 1, 2011 Sorry it's been a little while. Yes, checked with a noid light to determine no pulse. Fuel pressure was checked with a gauge to eliminate that possibility. CPS you say? I replaced it in January, but my truck did sit in the river for about 20 mins...... :( Think that could've broke it? Link to comment Share on other sites More sharing options...
Geonovast Posted October 1, 2011 Share Posted October 1, 2011 If you have spark, your CPS is good. (Well, good enough to turn on the injectors anyway.) I would check to make sure that all the ground wires going from the injectors are good and grounded properly. Link to comment Share on other sites More sharing options...
Mack4194 Posted October 5, 2011 Author Share Posted October 5, 2011 I'm going to replace the Computer. Hopefully that works :) Link to comment Share on other sites More sharing options...
Geonovast Posted October 5, 2011 Share Posted October 5, 2011 Certainly a distinct possibility at this point. Link to comment Share on other sites More sharing options...
Mack4194 Posted October 7, 2011 Author Share Posted October 7, 2011 Darnit, computer didn't fix it. There goes 110 bucks. Checked all wires for connection/grounding. No problems there that I was able to find. Link to comment Share on other sites More sharing options...
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