Ok, so here's the deal. A couple of days ago the wifes 98 Expy started having part throttle exceleration issues that activated the CEL. Pulled the codes, and found 0133, 0401, 0308. Did Vac check on the EGR, engine stalled. Looked for vac leaks, hoses and fittings appear to be in good condition, with no noticable hissing sounds. PCV hose assembly was replaced about a year ago, along with all COPs and plugs due to multiple misfire codes and finding vac leaks during that episode.

Knowing the 0401 code could cause multiple symptoms I chased that to the DFPE sensor. Reset codes and next came 1100, 0153, and 0308. Again, I replaced all COPs less than a year ago with Accel COPs, and replaced all plugs with Motorcraft plugs. So I am having trouble believing one of those could be faulty. One question coming to mind is this: could the 0153 code cause a lean condition that would cause the part throttle (1/4 - 1/2) miss, and the 0308 misfire? The intermittant MAF sensor could play into this too I think?!?

I also performed a KOEO test using the AutoEnginuity ScanTool and came up with several O2 sensor monitoring warnings, Catalyst bank1 and 2 switch ratio warnings, Evap system warnings. So much information, I am beginning to think I did something wrong.


Any help would be greatly appreciated.

<!-- / message -->

 

I would swap cop 8 with another cylinder to see if misfire moves first
Aftermarket cops have a unknown life, some last, some fail quickly
My .02

 

I had terrible experience with accel coils. No fun pulling 7500 lbs down the road 600 miles from home and start to miss again.

I replaced all my coils with Uneeksupply coils. These are very good aftermarket coils and I have not had any issues with them.

Thanks!

 

x4 its definitively a cop, use the old dizzy check by disconnecting one by one.....

 

+1 on problematic aftermarket COP's! I used Granatelli's and within the first year one of them failed. Next came the occasional CEL with a misfire code, tracked it down each time to a different Granatelli COP, replaced with the take offs from the first swap out. (My issue is cold weather causes one or more COP to misfire, when warm they work just fine, repeats next cold night.)

I've heard but don't know first hand Accel COP's are the most often reported failures. Never again will I use anything but MotorCraft COP's.