I have a 1996 Bronco with a 5.8L and E4OD transmission, 177k miles. It has started to stall when I decelerate quickly, especially turning. It restarts immediately if I shift it to neutral and crank it. I keep pulling a P0102 code, I've cleared it multiple times using an Actron CP9575.

I've replaced the MAF sensor, and the signal varies from 1.12-3.5 at the pigtail. It sits steady at 1.12-ish at idle. It appears to be grounded and getting 12V power in. I've also replaced the coil and the IAC valve. I left the pos/neg battery terminals disconnected for 30 minutes after replacing the MAF and IAC. It runs and idles better (IAC seemed really filthy), but still stalls on deceleration. If I put it in neutral while decelerating and give it gas to idle at 1000 rpm's, it doesn't stall.

Here's what I'm wondering about: The scanner I'm using shows live feedback, and when I'm driving, the "MAF LB/M" heading reads .10 to .13 under all conditions. The absolute TPS reading shows variation from 18.8 at idle to 92.2 at WOT, so I'm assuming the TPS is OK. But if the scanner is only showing .10 to .13 under all conditions for "MAF LB/M," does this mean that there's an issue with the wiring from the MAF sensor to the computer?

Sorry if this is a silly question, but I've looked at old threads and can't find an answer.

 

The hardest part about getting answers on a 96 Bronco is that OBD-II was ONLY employed this model year so a lot of us (Bronco owners) don't have a lot of insight into the OBD-II Codes... including myself. If I were not at work right now, I might look up some more information for you.

I will say that you should check fuel pressure as well as electrical possibilities. Fuel pressure is regulated by vacuum even in your 96. I'm not 100% certain what pressure OBD-II needs but I know its not less that about 40 PSI (fuel pressure) at the rail (Schraeder valve). It could be higher. Someone here knows for certain though.

 

If you are still having problems I'll be glad to let you run the same tests on my 96. It also has the 5.8L motor and the E4OD transmission (Eddie Bauer version) and has 255,000 miles on the original motor. Either leave a message here or drop a call to 567-8298.

Richard