jdiddyws6

iTrader: (5)

I have a 418 that I've had no problems out of. I was driving it today and it started hunting for idle at stop lights with the car in gear, sometimes dying. It's fluctuating by as much as 1000rpms. It is also breaking up at about 3k rpms, but cleans up a little bit they higher up you go. I changed the plugs with no improvement. Also, I was underneath it contemplating how to attack #8, and I noticed an 02 was unplugged. This had to be done earlier in the summer when I put some extenders in, but the car is rarely driven. Any Ideas?

jdiddyws6

iTrader: (5)

Car is throwing a maf code. Going to try and find one to troubleshoot with/

usnfenix

iTrader: (11)

i had a similar prob. it was o2 sensors.

lemons12

iTrader: (71)

That problem is definitely pointing at bad 02s...

I would unplug the maf while it is acting up, that will help rule it out.

If that isn't it, I would replace the o2s.

Let us know.

jdiddyws6

iTrader: (5)

The 02's are very fresh. Put them in over the summer, and the car is driven just a few times a month. They have < 1000 miles on them.

jdiddyws6

iTrader: (5)

Put a different maf in it. Problem is still the same. If i unplug it, it dies immediately.

blade2222

Unplug the maf then run the car and see how it runs.

jdiddyws6

iTrader: (5)

I did. It dies immediatly

jdiddyws6

iTrader: (5)

Hooked a truck coil pack rack up on driver then passenger, still breaks up and doesn't hold idle well.

jdiddyws6

iTrader: (5)

Tried 2 more MAFS with no luck. Throwing p0102 and 02 codes. It doesn't want to hold an idle, but it is no longer breaking up on acceleration.

jdiddyws6

iTrader: (5)

Well, found the problem. Evidentially the 02 sensors and the MAF are on the same fused circuit. Found a guy with the same problem, and he determined that the 02 grounded out and popped the fuse "engine control". Found it blown, changed it, and it's good to go.