EEC no timing advance
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EEC no timing advance
I have a 1992 F150,5.8l w/E4OD
The last service I did was to replace the MLPS after it's rusty/balky operation caused me to break my shift lever.
Several weeks later [it does not get driven much] it presented with low power,bogging down on throttle.
I have timed it w/SPOUT out at 10 BTDC and it idles fine. Whenever I advance RPM I do not get any timing advance [measured with timing light at the harmonic balancer] As a result it backfires out the intake and falls flat on it's face.
I have replaced the TPS and swapped with a known good ICM [when I tried the ICM it was not grounded so the swap may not be valid but other posts say the ICM only controls timing at idle]
Can anyone give me an idea why I have no timing advance with RPM/load?
BTW I can only start with starting fluid
Thanks Bill
The last service I did was to replace the MLPS after it's rusty/balky operation caused me to break my shift lever.
Several weeks later [it does not get driven much] it presented with low power,bogging down on throttle.
I have timed it w/SPOUT out at 10 BTDC and it idles fine. Whenever I advance RPM I do not get any timing advance [measured with timing light at the harmonic balancer] As a result it backfires out the intake and falls flat on it's face.
I have replaced the TPS and swapped with a known good ICM [when I tried the ICM it was not grounded so the swap may not be valid but other posts say the ICM only controls timing at idle]
Can anyone give me an idea why I have no timing advance with RPM/load?
BTW I can only start with starting fluid
Thanks Bill
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Fixed it by taking out the ECM and replacing the 3 largest capacitors. One was badly burnt and hanging by one leg.
For all the folks who say ECM as last resort it only takes a few minutes to pull it out and inspect it. Wish I had done it first
For all the folks who say ECM as last resort it only takes a few minutes to pull it out and inspect it. Wish I had done it first
More Turbo
Joined: Feb 2015
Posts: 508
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From: NE Ohio
I need to replace mine as well, where did you find the capacitors at? Was it online?
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