Recent Topics
Purolator P1 14476 CUT OPEN
by 53' Stude. 12/12/18 06:00 PM
Which car to buy?
by jrcowboys. 12/12/18 04:55 PM
New Tire Cracking
by robd. 12/12/18 04:43 PM
SAR B6P - Thoughts?
by 28oz. 12/12/18 03:59 PM
Time to sell the 1-ton Dually
by 02SE. 12/12/18 03:55 PM
Shell Rotella Grease
by WMW0505. 12/12/18 02:27 PM
Need to add attic ladder in stairwell
by Klutch9. 12/12/18 12:51 PM
Mystik JT-8 15w40, 2015 RAM EcoDiesel, 4,995 mi
by SavagePatch. 12/12/18 12:45 PM
Fram Tough Guard Air Filters at Rock Auto
by Snagglefoot. 12/12/18 12:42 PM
Electrical contact cleaner
by CELICA_XX. 12/12/18 12:32 PM
5w-30 in 277k mile chevy 350 tbi
by dogememe. 12/12/18 12:22 PM
voltage test for coolant condition
by NissanMaxima. 12/12/18 12:17 PM
paying Premiun for the name(infiniti/nissan
)

by 2008wrx. 12/12/18 11:25 AM
POE oil (R-410a)
by WyrTwister. 12/12/18 09:44 AM
Any Volvo Owners, need some help!
by LazyDog. 12/12/18 09:34 AM
NOACK & Sheer
by WyrTwister. 12/12/18 09:34 AM
Rotary help. 2010 series 2 RX8
by TinyVoices. 12/12/18 08:32 AM
Can you mathematically estimate top speed?
by KCJeep. 12/12/18 08:06 AM
Newest Members
jefe_de_estado, CM613, Geardaddies, 01ws666, ariefnrst
66660 Registered Users
Who's Online Now
105 registered members (Astro14, b1amgm47, bbhero, 53' Stude, ammolab, 15 invisible), 1,843 guests, and 38 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics294,992
Posts4,925,605
Members66,660
Most Online2,553
Oct 27th, 2018
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
engine dies when AC is on #4529697
09/29/17 05:50 PM
09/29/17 05:50 PM
Joined: Oct 2010
Posts: 141
TN
terry274 Offline OP
terry274  Offline OP
Joined: Oct 2010
Posts: 141
TN
My truck is a 1996 F150 with a 302 and automatic transmission, 133,000 miles. Plugs, wires, distributer cap and rotor are all new Motorcraft items. Ignition timing is set at 12 degrees advanced. (The problem was there before the timing was advanced) The fuel filter has been changed.

The truck runs very well with one exception. If I start it with the AC on, it will normally die or run very rough. With the AC off it is fine. The problem seems worse when it is at operating temperature.

Why is it doing this?


1996 Ford F150
2011 Toyota Avalon
2012 Honda Accord
2009 Ford Taurus
Re: engine dies when AC is on [Re: terry274] #4529701
09/29/17 05:58 PM
09/29/17 05:58 PM
Joined: Oct 2011
Posts: 5,091
USA
NHGUY Offline
NHGUY  Offline
Joined: Oct 2011
Posts: 5,091
USA
Maybe the AC compressor is starting to lock up....

Re: engine dies when AC is on [Re: terry274] #4529705
09/29/17 06:01 PM
09/29/17 06:01 PM
Joined: Apr 2008
Posts: 37,917
Ontario, Canada
OVERKILL Offline
OVERKILL  Offline
Joined: Apr 2008
Posts: 37,917
Ontario, Canada
Could be the IAC (Idle Air Control) valve, as they were prone to blocking up with carbon on the 302.


2018 RAM 1500 Big Horn EcoDiesel
2016 Grand Cherokee SRT
Re: engine dies when AC is on [Re: OVERKILL] #4529779
09/29/17 07:02 PM
09/29/17 07:02 PM
Joined: May 2016
Posts: 718
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 718
Canada
Originally Posted By: OVERKILL
Could be the IAC (Idle Air Control) valve, as they were prone to blocking up with carbon on the 302.



Yeah, if the idle mixture is too lean, it can stumble and die with a load like that. See if it happens when put a little pressure
on the gas peddle, once you open the throttle plate a bit, different air induction circuits overtake an IAC problem! Then the IAC is your 80% problem!

Re: engine dies when AC is on [Re: terry274] #4529816
09/29/17 07:43 PM
09/29/17 07:43 PM
Joined: Apr 2017
Posts: 1,422
San Rafael, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 1,422
San Rafael, CA
iac valve very common try one from junkyard off wrecked truck preferably so you can be pretty sure it was working


2010 Ford Escape 2.5~91K Miles: AMSOIL SS 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL
Re: engine dies when AC is on [Re: terry274] #4529828
09/29/17 07:55 PM
09/29/17 07:55 PM
Joined: Apr 2006
Posts: 9,278
Birmingham, AL
01rangerxl Offline
01rangerxl  Offline
Joined: Apr 2006
Posts: 9,278
Birmingham, AL
A/c compressor should probably have delayed engagement when starting, but I'm not sure on that truck. My 1994 Ranger delays the compressor until a couple seconds after it's started. Does your truck do this? If not, maybe look into that.


2002 Ford Ranger XLT | 3.0 V6 Auto 2WD | 224K miles
1994 Ford Ranger STX | 4.0 V6 Manual 4X4 | 200K miles
1994 Ford Explorer XLT | 4.0 V6 Auto 4X4 | 246K miles
Re: engine dies when AC is on [Re: terry274] #4529866
09/29/17 08:52 PM
09/29/17 08:52 PM
Joined: Apr 2016
Posts: 965
KS
FordBroncoVWJeta Offline
FordBroncoVWJeta  Offline
Joined: Apr 2016
Posts: 965
KS
My 94 bronco did that when at a stop. Next thing I did I went down the highway and turned the AC full blast. Never did it again.


2017 Volkswagen Jetta 1.4T - 2015 Honda CRV 2.4 - 2012 Volkswagen Jetta 2.0 - 2001 Pontiac Sunfire 2.2
Re: engine dies when AC is on [Re: 01rangerxl] #4529943
09/29/17 10:59 PM
09/29/17 10:59 PM
Joined: Jun 2003
Posts: 17,814
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,814
Deplorable in apple valley, ca
Originally Posted By: 01rangerxl
A/c compressor should probably have delayed engagement when starting, but I'm not sure on that truck.
his does not have that. Turning on the ac powers the compressor up immediatly.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: engine dies when AC is on [Re: terry274] #4529951
09/29/17 11:14 PM
09/29/17 11:14 PM
Joined: Sep 2005
Posts: 5,909
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,909
MIchigan
Weak Alternator

Re: engine dies when AC is on [Re: terry274] #4530079
09/30/17 08:27 AM
09/30/17 08:27 AM
Joined: Aug 2003
Posts: 11,013
Buffalo, NY
JTK Offline
JTK  Offline
Joined: Aug 2003
Posts: 11,013
Buffalo, NY
So the stalling with the A/C turned on is only at idle RPM? Like said, possible IAC valve issue. I've seen A/C compressors lock up all at once and it will smoke the belt and can stall the engine.


2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)

BOB IS THE OIL GUY® Powered by UBB.threads™