Rough Idle
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
Rough Idle
I have been working on this for some time. When I start the car it fires up nice then settles in to a rough idle. When I step on the gas it hesitates. No codes come up.
I decided to check the TPS which was fine. I then checked the IAC which was fine. In the process I disconnected the MAF and forgot. I started the car. It had a little hesitation at first but started and ran fine. It did bring up a code for the MAF sensor. Continues to run fine unless the MAF is plugged in.
Is this a MAF problem, a problem with the MAF relays, or something else?
Thanks
I decided to check the TPS which was fine. I then checked the IAC which was fine. In the process I disconnected the MAF and forgot. I started the car. It had a little hesitation at first but started and ran fine. It did bring up a code for the MAF sensor. Continues to run fine unless the MAF is plugged in.
Is this a MAF problem, a problem with the MAF relays, or something else?
Thanks
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Sounds like your MAF was doing its job if it wansn't throwing codes before......but why not do a little maintenance anyway:
Get some MAF cleaner and clean the sensor.
Replace both the power and burn-off relays if they have been in there a long time. Oh and clear the MAF code off your ECM.
Get some throttle body cleaner at the parts store while your there and clean up that TB while your at it.
Clean or change your O2 sensor.
Clean or change your air flilter if you've not done that in a long time.
Check or change your plugs.
Good Luck!
Get some MAF cleaner and clean the sensor.
Replace both the power and burn-off relays if they have been in there a long time. Oh and clear the MAF code off your ECM.
Get some throttle body cleaner at the parts store while your there and clean up that TB while your at it.
Clean or change your O2 sensor.
Clean or change your air flilter if you've not done that in a long time.
Check or change your plugs.
Good Luck!
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
Have cleaned the throttle body. Plugs have been inspected and wires aren't too old.
I was thinking of checking the o2 sensor but haven't got the energy back from walking around Carlisle.
K&N air filter. Probably only about 500 miles since it was last cleaned and oiled.
I was thinking of checking the o2 sensor but haven't got the energy back from walking around Carlisle.
K&N air filter. Probably only about 500 miles since it was last cleaned and oiled.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
If the car runs better with the MAF disconnected it is probably the MAF or maybe the relays that was your problem . What you did is actually the way that you check to see if the MAF is working.I would change the relays first to see if thats the problem because if it turns out to be the MAF the relays should be changed anyway....
Last edited by WW7; Aug 26, 2008 at 07:18 PM.
