Big cam causing rough idle
Posted: April 24th, 2023, 5:25 pm
I have a 4.6 stroker with a big cam, I have some extra gauges so I can see what's going on, it idle really rough at 10 afr and about 12 inHg, I think because the cam is not making enough vacuum, I'm also getting map sensor code, the adjustable map sensor will not work, I have the opposite problem, too much fuel, I tried it already, what I've gathered is the cam is not making enough vacuum, causing the map sensor to read at about part to mid throttle, telling the ecu to put more fuel in, causing a rich idle, at cruise and al little below cruise it is fine, at 14.7, when at idle you can see the afr adjust up th about 13.2 and then drop back to 10, like it's trying to adjust but I just can't quite do it, what has everybody done to deal with this issue, I'm thinking about running a microsquirt to fix it and just so I can get the full power of the engine