haha...not a continuation of previous DiscoWeb rantings, but take a gander; maybe you can help me out...
Here's the deal, I bolted Slade's 14CUX EFI system (from manifold to ECU) on my 3.5. He had the ECU rechipped with a 4.2 chip for his 4.2 engine.
SO, effectively, I've got 4.2 fueling and air flow parameters running my 3.5. Problems? A few...
Mostly I have low-rpm hesistation. This usually occurs at steady-rpm driving and mild-acceleration...usually at low RPM. Keep in mind the engine idles fine and at freeway RPMs, everything is fine, too.
I've been getting a code for 40 and 50, which is ignition misfire on both banks. However, I doubt this is what is causing the hesitations/misfires...
if I increase the engine RPM (from the engine bay) and disconnect the mass-air meter, the engine will return to idle just fine AND the hesitation is completely gone!!!
Got that? The car drives better with the mass-air meter disconnected than when it's plugged in. I've never blown a mass-air code (only when I unplug it), and when I plug it back in the hesitation comes back.
So...I don't think I am having ignition problems, but I think 1) the mass air meter is heading south, or 2) I need to rechip the ECU with either a 3.9 chip or a 3.5 chip (this supposedly exists for late 80's/early 90's Discos in the UK using the 14CUX EFI) to move back within the parameter range intended for my engine's fueling and air-flow range.
Anybody have some insight? Personally, I think Mike knew this sh*t was jacked when I bought it which is why he was sooooooo surprised when I got it running :flipoff2: j/k Mikie!!!
I just bought a mass-air sensor off E-Bay for cheap and I've heard the 3.9 chips are a dime a dozen. Anybody got a scoop on a 3.9 or an elusive 3.5 chip laying around?