rklahs Posted March 21, 2014 Share Posted March 21, 2014 changed injector line and helper crossed #3 with#4 at pump test drove about 4 miles checked line and put them back in order but still wont hit on 3 or 4 what damage could be done, Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/ Share on other sites More sharing options...
j hancock Posted March 21, 2014 Share Posted March 21, 2014 Did you bled out the air in the lines? Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238437 Share on other sites More sharing options...
theakerstwo Posted March 21, 2014 Share Posted March 21, 2014 If I had it here I would first take a spare line and injector and connect the line and injector to each connection on the injection pump leaving the injector out in the air and run it. Observe the fuel spray from each barrel and plunger on the injection pump.If they all look the same delivery then check for a blowed head gasket. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238492 Share on other sites More sharing options...
rklahs Posted March 22, 2014 Author Share Posted March 22, 2014 Thanks for your replies and yes idid bleed air at injectors then started truck and bleed again but 3and4 were missing. Iknow now that it was because they were reversed. Do you think iblew the head gaskets on test drive about 4 miles. Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238541 Share on other sites More sharing options...
gearhead204 Posted March 22, 2014 Share Posted March 22, 2014 3 and 4 should be on different heads so I doubt that's it try what glenn said remove injectors and re configure the lines so you can run the eng. with the injectors hanging in the air and look at the pattern (from a safe distance) if this checks out then do a comp. test. Your helper didn't leave a shop rag in the intake by chance ? Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238563 Share on other sites More sharing options...
theakerstwo Posted March 22, 2014 Share Posted March 22, 2014 A rag in the intake.I saw that happen just two weeks ago.Some one installed a engine and droped a rag in and it went to the rear cyl and messed with a few minds. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238593 Share on other sites More sharing options...
rklahs Posted March 22, 2014 Author Share Posted March 22, 2014 No rag only #3 injector line was removed but help remove 3456 at pump to get line back on thats when he reversed lines 3,4. Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238637 Share on other sites More sharing options...
rklahs Posted March 23, 2014 Author Share Posted March 23, 2014 Hey guys does any one of a good place to order head gasket and injectors for this 87 Em6 two valve motor or would it be better to try to have the injector rebuilt. DM686S Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238748 Share on other sites More sharing options...
gearhead204 Posted March 23, 2014 Share Posted March 23, 2014 don't know about 2 valve but 4 valve injectors from mack are around 70.00 bucks each Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-238753 Share on other sites More sharing options...
rklahs Posted March 27, 2014 Author Share Posted March 27, 2014 Thanks for all your help guys i found a spare line and will pick up an injector this week , will let you know the results. Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-239470 Share on other sites More sharing options...
thomastractorsvc Posted March 27, 2014 Share Posted March 27, 2014 Are you getting fuel to #3 at the injector pump? crack that line and see if it is spitting fuel maybe the plunger/pump spring is stuck? Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-239486 Share on other sites More sharing options...
rklahs Posted April 8, 2014 Author Share Posted April 8, 2014 #3 and 4 spit fuel but the other 4 seem to flow more than spit Quote Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-241114 Share on other sites More sharing options...
thomastractorsvc Posted April 8, 2014 Share Posted April 8, 2014 If the truck had sat for awhile maybe the plunger/pump spring is stuck, you should have a cover on the side of the pump you can remove and check them Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/35109-87-em6-2valve-injector-problem-need-help/#findComment-241137 Share on other sites More sharing options...
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