Lm7 wot timing
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Teching In
Joined: Aug 2015
Posts: 24
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Lm7 wot timing Ok I have another thread open for a lm7 swapped into a ford ranger (2006 lm7/psi standalone harness)but I have since completed the swap and when I first drive it I could tell it was lacking power so I hooked up my scan tool and had code p0327 pop up so I took the manifold off and the front knock sensor hole was full of coolant that had leaked and drained into the hole and so I took both out and replaced both knock sensors and the code has gone away but it is still weak under heavy throttle so I hooked up my scanguage which shows timing and under 1/3 throttle and below timing is anywhere between 20-35* and the more throttle/load I apply the lower the timing goes all the way down to the single digits under wot. What else could be causing that low of timing? I'm going to source a wideband to barrow to see where my afr's are but could the timing even be pulled back that much from the comp for just narrow bands?
TECH Addict
Joined: Aug 2005
Posts: 2,305
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From: Monroe,NY
Here are stock LM7 timing tables. On mine when i go WOT i am in the .76 to .88
cylinder airmass area. So at wot i would only have 11 degrees of advance on the high octane table. I would be in the single digits on the low octane table.
cylinder airmass area. So at wot i would only have 11 degrees of advance on the high octane table. I would be in the single digits on the low octane table.
