I changed the mass air intake valve TWICE on my 1994 Crown Vic. Whenever I plug it in, the car stalls. When I unplug it, the car hesitates. What is the problem?

Question 1

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Hello? Emission problem 1994 crown vic here...

I owned one of these. There is a groove under the butterfly horn of the throttle. There are 8 bolts and a $10 gasket. Often the EGR passage is clogged and it throws off the calibrations and when you clean this groove the engine will run much better.

Jul 21, 2014 • 1994 Ford Crown Victoria

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Van stalls intantly- misses bad if I give it gas.. Changed intake gaskets, both o2 sensers, cleaned MAF senser,and changed fuel filter.. Codes read bank 1&2 lean.. Only thing I can think of next is...

It could be a weak pump. To check, have your fuel pressure checked to see if it is correct for your vehicle. On mpfi, pressure should be around 50 psi-check the requirement for your particular vehicle. Then look to the injectors.

Apr 09, 2013 • Cars & Trucks

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'97 crown vic cranks but stalls immediately

Idle air control valve. And/or gunked up throttle body, pcv port at throttle where mating to intake manifold.

Jul 08, 2017 • 1997 Ford Crown Victoria

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1answer

1999 FORD CROWN VIC. 4.6 - PROBLEM, NOISE

This is caused by the IAC valve. Over time the valve becomes gummy and inoperative. Get it replaced and the problem is solved. IAC stands for idle air control, hence the stalling concern.

Oct 17, 2009 • 1999 Ford Crown Victoria

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98 Astro Van,when warm hesitating, stalling

WELL YOU CHANGED ALMOST EVERY THING EXCEPT IGNITION CONTROL MODULE........

Jun 27, 2009 • 1998 Chevrolet Astro

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1992 crown vic with 78K miles. Started skipping

Replace you Maf sensor and have a nice day. lol does the hesitation go away when you let off the gas. does it buck hesitate and misfire under load? most common problem is the maf sesnor.
easy to change. don't buy a used part it may develop the same problem after a little while. you can try cleaning the wire inside with brake cleaner (not intake cleaner). it may or may not help.

Jun 26, 2009 • 1992 Ford Crown Victoria

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1answer

Hesitation problem

try cleaning the inside of the MAF sensor and do the following procedure as well.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Mar 24, 2009 • 1994 Cadillac Fleetwood

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My 4.6 idles erratically.

try the following, if that doesn't correct it u may need to replace the air bypass valve.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Jan 07, 2009 • 1997 Ford Crown Victoria

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1answer

Wont stay running

You may have a defective idle speed control valve. Clean it first.

Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Nov 13, 2008 • 1998 Ford Expedition

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1answer

Air intake makes noise 1994 crown vic

change the idle air control valve and this will stop.

Jul 12, 2008 • 1994 Ford Crown Victoria

Question 2

Paul Cofrancesco

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Posted on Feb 10, 2015

Paul Cofrancesco

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1. download torque pro (free app) & purchase the iSaddle Super Mini ELM327 V1.5 OBD2 OBD-II Bluetooth CAN-BUS Auto Diagnostic Tool on amazon for $15 delivered. You will need it to get diagnostic info and codes. Cheaper and better than any OBD you can buy in the store and works from the app on you phone and communicates by bluetooth. You can pull and record real time info while driving.
2. join a crown vic owner forum for more specific info.

1 more comment
Chris Blizzard Feb 11, 2015

I have a smart phone, but not an android. Any other suggestions?
Chris Blizzard Feb 11, 2015

I also don't have a bluetooth I also don't have a bluetooth
Paul Cofrancesco Feb 11, 2015

You can also use an Android tablet or borrow anybody's phone or buy a phone on Craigslist you they will still be cheaper than buying a dedicated obd2 scan too

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I changed the mass air intake valve TWICE on my 1994 Crown Vic. Whenever I plug it in, the car stalls. When I unplug it, the car hesitates. What is the problem?

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Paul Cofrancesco

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Related Questions:

Hello? Emission problem 1994 crown vic here...

Van stalls intantly- misses bad if I give it gas.. Changed intake gaskets, both o2 sensers, cleaned MAF senser,and changed fuel filter.. Codes read bank 1&2 lean.. Only thing I can think of next is...

'97 crown vic cranks but stalls immediately

1999 FORD CROWN VIC. 4.6 - PROBLEM, NOISE

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Air intake makes noise 1994 crown vic

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1994 Crown Victoria

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I changed the mass air intake valve TWICE on my 1994 Crown Vic. Whenever I plug it in, the car stalls. When I unplug it, the car hesitates. What is the problem?

1 Answer

Paul Cofrancesco

Add Your Answer

Attachments: Added items

Related Questions:

Hello? Emission problem 1994 crown vic here...

Van stalls intantly- misses bad if I give it gas.. Changed intake gaskets, both o2 sensers, cleaned MAF senser,and changed fuel filter.. Codes read bank 1&2 lean.. Only thing I can think of next is...

'97 crown vic cranks but stalls immediately

1999 FORD CROWN VIC. 4.6 - PROBLEM, NOISE

98 Astro Van,when warm hesitating, stalling

1992 crown vic with 78K miles. Started skipping

Hesitation problem

My 4.6 idles erratically.

Wont stay running

Air intake makes noise 1994 crown vic

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1994 Crown Victoria

Hello? Emission problem 1994 crown vic here...

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