[james008]

Driving to work today (40miles) No spirited driving just normal highway cruising. I get to my exit and sitting at the light the cars starts running slightly rough not misfire just not smooth. I get to the turn and it starts misfiring bad and CEL comes on. I pull over restart car and drives fine for about 2 miles then starts misfiring again... Restart again drives fine to work. I check codes:
10700
10701 Cylinder 1
10702 Cylinder 2
10927 Fuel Pump Plausibility
10713 Fuel Tank Low

I go through about a quart of oil every 1,400-2,000 miles give or take. 92,000 miles on the car
FBO
Procede

Just replaced all 6 injectors 3 months ago and it has ran great.
Spark plugs about 4 -5 months ago.
Some new coils but might be time to just replace them all.

First plan I guess is to replace all plugs and coils.

It just seems constant every few months it's something.

[MDORPHN]

Have you ever walnut-blasted -- or otherwise cleaned -- the intake valves?

Neil

[foghat]

Swap the coils around and see if the misfire follows the coil.

[badass335]

Tuned?

[james008]

Tuned for about 30,000 miles with Procede. It misfired on map 0 too.
Valve cleaning about 20,000 miles ago but might be time to do it again.

It just seems weird that I restart the car and it goes away. I just want the thing to run well.
This car is so much fun to drive when it runs right, then it misfires I tears my heart in two.

[BAL278]

Originally Posted by james008

Tuned for about 30,000 miles with Procede. It misfired on map 0 too.
Valve cleaning about 20,000 miles ago but might be time to do it again.

It just seems weird that I restart the car and it goes away. I just want the thing to run well.
This car is so much fun to drive when it runs right, then it misfires I tears my heart in two.

I feel your pain... I've been getting misfires and the 2932, 29f2 codes as of late... I'm getting my intake valves walnut blasted and replacing the HPFP and Low pressure Fuel sensor... It came to this because I too tried replacing injector(s), Plugs, and Coils...

When it's running right.. it's magical, but when it is not, it is heart breaking

[Ovitrix335]

Take the procede out and see how it works with no tune. Also try a set of ngk 5992 plugs gapped at .022" and new coils.

I had something like that but were my injectors that were going bad, swapped them out and no problems so far.

[Jeff@TopGearSolutions]

It's probably just a couple old coilpacks at this point.

You've done a good job maintaining the car everywhere else.

[badass335]

its possible its coil packs but I would take out the procede and run it. It could be a failing fuel pump issue as well. Cheaper solution, swap coils around and see if it follows. I had a few coils fail and for me, as soon as I started the car, it was misfiring once the coil failed.

[cxesar]

Newbie question here, is there a recommended mileage interval to replace plugs, coils, and injectors? I just got the car last week and i'm trying to figure out which parts should be given priority in order to avoid misfires. Car is at 77k miles.

[james008]

Injectors add up fast, I would say start with Plugs and Coils, which you can pick up for about $360 total for all 6 of each.

Plugs probably should be replaced every 15,000 miles? and probably Coils every 40,000? Since you don't know the history of the car I would be tempted to do both in the near future. But that is just my .02

Originally Posted by cxesar

Newbie question here, is there a recommended mileage interval to replace plugs, coils, and injectors? I just got the car last week and i'm trying to figure out which parts should be given priority in order to avoid misfires. Car is at 77k miles.

[cxesar]

Originally Posted by james008

Injectors add up fast, I would say start with Plugs and Coils, which you can pick up for about $360 total for all 6 of each.

Plugs probably should be replaced every 15,000 miles? and probably Coils every 40,000? Since you don't know the history of the car I would be tempted to do both in the near future. But that is just my .02

Sounds good, thanks man!

[james008]

Swapped the coils around ran fantastic all the way home and back today. Did a few WOT's last night ran great... to be continued...

[j1gilles]

Originally Posted by BAL278

I feel your pain... I've been getting misfires and the 2932, 29f2 codes as of late... I'm getting my intake valves walnut blasted and replacing the HPFP and Low pressure Fuel sensor... It came to this because I too tried replacing injector(s), Plugs, and Coils...

When it's running right.. it's magical, but when it is not, it is heart breaking

replacing my low pressure fuel sensor rid me of my misfire

[james008]

Bit me in the arse again today driving to work. Local shop gave me a few used coils as backup and to try and diagnose issue. It's going in on Tuesday for oil change and all new spark plugs and coils. If that doesn't do it I guess I will start looking deeper.

[MIL.SPEC]

ProCede is an interceptor system. I had issues with an XEDE on my Evo. I would not want to run an interceptor system again on any car. Just my opinion.

First thing you should do before swapping coils is disconnect the ProCede and see what happens.

[scottp999]

Originally Posted by MIL.SPEC

ProCede is an interceptor system...First thing you should do before swapping coils is disconnect the ProCede and see what happens.

Completely agree.

James - What version of Procede hardware are you running? Rev2, 2.5, 3?

Reason I ask is that if you run some of the later maps (circa 2012), some were dedicated to 2.5 and 3 only. If you run them on rev 2, the readme says:

"Using them on Rev2 hardware will result in ignition codes/misfire/etc,."

[james008]

I'm running the 2.5 with the appropriate maps and firmware I have been running the procede for over a year. I am going to remove the procede for a dealer visit anyway (after the plugs and coil replacement) for recall stuff. I may give Wedge's flash maps a try before putting the procede back it. I swapped the coils around again and it's been running fine for two days. Probably clogged plugs or old coils.