Idle Issues

StockFox · July 27th, 2011, 04:16 AM

I got caught in the rain with the hood up for about 3 minutes, I closed the hood and the next day I started the car and the battery light came on and it won't stay running at idle. If I keep it above 1500 rpms it stays running and the battery light never go out. also sometimes it will take a few times for it to start up. The battery gauge needle goes to the normal area when started and it turns over just fine. I let the car sit for a day in the sun to let everything dry out but nothing changed. Tomorrow I will put a meter on the battery to see if the alternator is charging correctly. I haven't had a chance to really look into it because of work. Any ideas on what it might be?

The car is fuel injected

StockFox · August 7th, 2011, 01:36 PM

71 views, NO response wow thanks guys.......

even though I havent got any responses I am going to add more info:

The alternator issue is fixed but it still will not idle.
If it sit over night or long enough to cool it will start and idle till it gets warm and it shuts off. Then when you restart it, it starts up idle for 3-5 seconds then shut off unless you hold it above idle. Does this sound like a bad maf or iac?

bigjohnstud4200 · August 7th, 2011, 01:40 PM

remove the cop's, I can almost guarantee there is water stuck underneath them. blow it out with air compressor.

StockFox · August 7th, 2011, 02:06 PM

that worked on my 04 mach1 before, but this is a foxbody pushrod engine.

ryanw · August 7th, 2011, 03:48 PM

Run your codes and see if any thing come up

bigjohnstud4200 · August 7th, 2011, 04:12 PM

Originally Posted by StockFox

that worked on my 04 mach1 before, but this is a foxbody pushrod engine.

oh shoot.. sorry.

DShort · August 7th, 2011, 04:41 PM

Originally Posted by StockFox

I got caught in the rain with the hood up for about 3 minutes, I closed the hood and the next day I started the car and the battery light came on and it won't stay running at idle. If I keep it above 1500 rpms it stays running and the battery light never go out. also sometimes it will take a few times for it to start up. The battery gauge needle goes to the normal area when started and it turns over just fine. I let the car sit for a day in the sun to let everything dry out but nothing changed. Tomorrow I will put a meter on the battery to see if the alternator is charging correctly. I haven't had a chance to really look into it because of work. Any ideas on what it might be?

The car is fuel injected

I washed an engine without it running and had water trapped in the sparkplug wires, If the alternator is charging, check for water in the plug wires.

StockFox · August 8th, 2011, 11:27 PM

Its fixed. When I cleaned the maf and started it up this morning it still would shut off in about 2 seconds at idle. This afternoon I started it up and it runs fine. I sprayed the sensor pretty good and I guess it wasn't dry enough when I tried it.

ryanw · August 8th, 2011, 11:32 PM

Hmmmm. So i take it that the rain wasnt a factor in the issue you had with your car ? cuz i dont see how rain would have gotton inside your maff. So it was just dirty ?

StockFox · August 9th, 2011, 02:20 AM

Ok, I only spent about 30-45 minutes on the days that I looked at the car (busy). I didn't replace anything just checked connections and cleaned but nothing changed. When I removed the air filter I sprayed maf cleaner on the sensor inside. I sprayed quite a bit of it on the sensor and let it sit for awhile. I put the air filter back on and started it up and it still would cut off after 2 seconds of idling. So I left it alone and came back about 3 hrs later and gave it one more try and it stayed running. Took it for a ride and back and it kept idle.

So my guess is that the water got through the filter and mixed with the filter oil (k&n) and it got on the sensor filament.

ryanw · August 9th, 2011, 10:50 PM

Also, in case you didnt know, And ive made this mistake my self. When you oil the k&n filter, you should only use a varry varry varry light coating of oil on the filter, thats all you need. If you put to much oil on or you dont let the oil set for a while (dry),before you drive itl, then oil gets sucked up the intake and gets all over your mass air flow sensor.

July 27th, 2011, 04:16 AM	#1
StockFox Newbie 1993 Mustang LX Join Date: May 2011 Location: Georgia Posts: 27 iTrader: 0 reviews	Idle Issues I got caught in the rain with the hood up for about 3 minutes, I closed the hood and the next day I started the car and the battery light came on and it won't stay running at idle. If I keep it above 1500 rpms it stays running and the battery light never go out. also sometimes it will take a few times for it to start up. The battery gauge needle goes to the normal area when started and it turns over just fine. I let the car sit for a day in the sun to let everything dry out but nothing changed. Tomorrow I will put a meter on the battery to see if the alternator is charging correctly. I haven't had a chance to really look into it because of work. Any ideas on what it might be? The car is fuel injected

August 7th, 2011, 01:36 PM	#2
StockFox Newbie 1993 Mustang LX Join Date: May 2011 Location: Georgia Posts: 27 iTrader: 0 reviews	71 views, NO response wow thanks guys....... even though I havent got any responses I am going to add more info: The alternator issue is fixed but it still will not idle. If it sit over night or long enough to cool it will start and idle till it gets warm and it shuts off. Then when you restart it, it starts up idle for 3-5 seconds then shut off unless you hold it above idle. Does this sound like a bad maf or iac? __________________ 93 Mustang LX - dss 331ci, 9.4:1cr, edelbrock 60259 heads, 284hr cam, cobra intake, vortech s-trim, c4, 4600 stall, 3.73, 1 5/8 lt, 2 1/2" h-pipe, mac pro dumps, 42# inj, 90mm maf, 70mm tb...

August 7th, 2011, 02:06 PM	#4
StockFox Newbie 1993 Mustang LX Join Date: May 2011 Location: Georgia Posts: 27 iTrader: 0 reviews	that worked on my 04 mach1 before, but this is a foxbody pushrod engine. __________________ 93 Mustang LX - dss 331ci, 9.4:1cr, edelbrock 60259 heads, 284hr cam, cobra intake, vortech s-trim, c4, 4600 stall, 3.73, 1 5/8 lt, 2 1/2" h-pipe, mac pro dumps, 42# inj, 90mm maf, 70mm tb...

August 7th, 2011, 03:48 PM	#5
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Run your codes and see if any thing come up __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

August 8th, 2011, 11:32 PM	#9
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Hmmmm. So i take it that the rain wasnt a factor in the issue you had with your car ? cuz i dont see how rain would have gotton inside your maff. So it was just dirty ? __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

August 8th, 2011, 11:27 PM	#8
StockFox Newbie 1993 Mustang LX Join Date: May 2011 Location: Georgia Posts: 27 iTrader: 0 reviews	Its fixed. When I cleaned the maf and started it up this morning it still would shut off in about 2 seconds at idle. This afternoon I started it up and it runs fine. I sprayed the sensor pretty good and I guess it wasn't dry enough when I tried it.

August 9th, 2011, 02:20 AM	#10
StockFox Newbie 1993 Mustang LX Join Date: May 2011 Location: Georgia Posts: 27 iTrader: 0 reviews	Ok, I only spent about 30-45 minutes on the days that I looked at the car (busy). I didn't replace anything just checked connections and cleaned but nothing changed. When I removed the air filter I sprayed maf cleaner on the sensor inside. I sprayed quite a bit of it on the sensor and let it sit for awhile. I put the air filter back on and started it up and it still would cut off after 2 seconds of idling. So I left it alone and came back about 3 hrs later and gave it one more try and it stayed running. Took it for a ride and back and it kept idle. So my guess is that the water got through the filter and mixed with the filter oil (k&n) and it got on the sensor filament.

August 9th, 2011, 10:50 PM	#11
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Also, in case you didnt know, And ive made this mistake my self. When you oil the k&n filter, you should only use a varry varry varry light coating of oil on the filter, thats all you need. If you put to much oil on or you dont let the oil set for a while (dry),before you drive itl, then oil gets sucked up the intake and gets all over your mass air flow sensor. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

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