- May 16, 2014
- 78
- 2
- 8
Cleaned my MAF it learned up my low rpm stutter but now have a bad stutter at WOT. it's fine if you ease into it. Did I screw it up.
Maf
- Thread starter Paul1981610
- Start date
-
Sponsors (?)
- May 16, 2014
- 78
- 2
- 8
restomod66
Active Member
It depends, did you use the proper chemical spray made specifically for MAF's? The sensor elements inside of those are extremely sensitive and can go haywire if you touch it or leave residue behind. I would double check for vacuum leaks first and if the problem persists clean it again to see if there is any improvement. I got a CEL some time ago and after cleaning my MAF thoroughly it went away.
- May 16, 2014
- 78
- 2
- 8
Put a MAF on from another car same symptoms. Unplug it and it runs fine. Could it be a damaged plug or broke wire.
stangr5oh
Active Member
When you unplug the MAF the ECU will calculate stock parameters on what the air flow should be and run fine. Basically you would be running speed density instead of mass air. Here is a good link I stumbled across awhile back on this site about troubleshooting MAF.
http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/maf-sensor-tests-1
http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/maf-sensor-tests-1
- May 16, 2014
- 78
- 2
- 8
stangr5oh
Active Member
I was plagued with some maf relsted issues for a while. I soldrred in a new pigtail I got from RJM and all is well.
Was yours fine until you cleaned it?
Was yours fine until you cleaned it?
- May 16, 2014
- 78
- 2
- 8
- May 16, 2014
- 78
- 2
- 8
Yes it was only sputtering at low rpms. That is now gone. Installed a different MAF from another mustang that has no issues same thing. The only thing is I haven't had the new pigtail and a different MAF at the same time yet. It is almost feeling like a coil pack now. That would be a weird coincidence
stangr5oh
Active Member
Are you getting any CEL's? If a COP were to go bad on any one cylinder you would get a CEL. Also I have had COP's go bad and a sure sign for me when one went bad was at start up when I turn over the key the engine would clatter for a split second cause the COP was lacking spark in one of the cylinders. When was the last time you checked your plugs for a fouled tip or wet tip? Or when were they last changed or what kind of plug are you using? I would really like to know if you are getting any CEL's and if so what are they. How long has this been going on? Is this something new or old? It could be a case of bad fuel, or a clogged injector. Did you recently run the tank low before a fillup? Sometimes debris from the tank will clog an injector too.
- May 16, 2014
- 78
- 2
- 8
No CEL. new plugs last week. Never run it too low. I may try a new MAF. Too much of a coincidence the way the events happened
- May 16, 2014
- 78
- 2
- 8
New fuel filter two weeks ago also. Using Bosch platinum +4. Has has small hesitation almost loading up at low rpm under 2k. So I replaced fuel filter and plugs and ran sea foam thru tank. Had 3:55 installed and the day I brought it home I removed MAF to clean put back in and low rpm he's rotation cleared but now bad miss and black smoke at 3/4 or more throttle. No lights nothing. Put MAF from another car in no change. Put a new pigtail on and it's better but not right. Maybe I somehow messed plug up at the same time as the MAF went bad. I haven't yet had the new pigtail and a different MAF on at the same time will try that today.
- May 16, 2014
- 78
- 2
- 8
stangr5oh
Active Member
Seafoam would cause the black smoke as it may still be in your tank and cleaning still. The injector(s) may be clogged due to the seafoam. I have seen that and done that myself before. I the MAF was just a coinsedence though. I would look toward a partially blocked injector or those Bosch plugs. That last part was my opinion coming into play, I hate Bosch. I think they are the worst for our application.
I would say to ditch those Bosch Platinum plugs and get some Autolite copper or my preference, NGK v power plugs in there and make her happy
- May 16, 2014
- 78
- 2
- 8
I have no boost gauge right now. It is a Saleen series 1 and it has a red billet pulley that I believe is smaller.
man, do yourself a favor and get a boost gauge, and a wideband afr gauge. That's the only way you will know what's going on with your car on a regular basis
Similar threads
