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No signal from ecm to fuel injector help please

I have a 1989 dodge van b250 with 318. It won't start i am getting fuel up to the injectors but injectors not opening. Noid light not lighting up but i have power from battery to injectors. green wire goes from battery to fuel pump relay to fuel pump from there to the injector but the white wire and the tan wire from the smec (single module engine control) is not sending out anything they are dead. Any ideas on how I can fix this?

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6ya6ya
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Posted on Jan 02, 2017

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  • 14 Answers

SOURCE: 2003 TDI 160,000 km, manual transmission

Hi, I realy believe you are low on full & by making the turn you got air in the system. Add fuel, then get an assistant to cranck the engine for you while you blead the injectors throughly. One by one, till you see no bubbles coming out. If you have air in the diesel, preasure will be very low as you described. Hope that does it.

Posted on Dec 11, 2008

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  • 15 Answers

SOURCE: po302 code,po301,po300

usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens

Posted on Dec 27, 2008

  • 1 Answer

SOURCE: 89 s10 2.5 has fuel and fire injector has power but no pulse

injector pulse is just controlled by the ecm or computer as some would say,u said u replaced wires? did u have a fire or melt wires? ecm is known to go bad on these,had a few of these trucks back in the day.

Posted on Feb 16, 2009

  • 1 Answer

SOURCE: My 1994 suburban engine stops. No fuel, no MIL light.

I checked all of the fuseable links and they were all good. Next I decided to check all the power wires to the ECM and also the grounds from a wiring diagram because the Mil is controlled by the ecm and the bulb was good. The ecm is located behind the glove box. Bingo, the orange wire was only reading 3-5 volts at the ECM, but 12.5 volts after the fuseable link at the underhood fuse block (passenger side firewall). I ran a temp wire directly from after the fuseable link to the orange wire at the ecm and the ecm turned back on and the Mil or "check engine soon" light came on too. The truck started up and has never run smoother.

Note that at first the truck just stalled out and I could restart it right away with no error codes. Eventually the stalling became more frequent with longer reset times required. Once it threw a "code 54" and I thought it was fuel related as each time the gas stopped and I could still start the truck with gas poured into the TB. Ignition ok. My fuel pump turned on and ran if I tested it. I even checked the pressure regulator and the fuel filter to no avail.The orange wire that powers up the ecm is technically part or the fuel pump relay circuit as it also feeds the fuel pump relay 12.5 volts all the time. The thin orange wire from the fuse block is joined to two other thin orange wires in the large group of wires that heads to the ecm along the firewall behind the engine. I had to dig it out of the many wires to find it and remove a lot of tape. It is amazing to me that this one little orange wire could cause so much grief and be so hard to track down. I could not have afforded to take this problem to the Dealer.

Posted on Mar 26, 2009

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SOURCE: 1993 honda accord 2.2,no injector pulse

This sounds like a main relay problem here is a diagram its located under the dash under steering column its the brownish -orange box in the picture. http://www.tegger.com/hondafaq/mainrelaylocation/7-main_relay_closeup.jpg Good luck and thanks for using FIX YA

Posted on May 15, 2009

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