Question about Cars & Trucks

2 Answers

1991 Crown Vic. Hard to start, and hesitates when trying to take off, replaced the egr, Evp & tps sensors, did not work.

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 226 Answers

Did you check your TPS sensor? Throttle Position Sensor? this could you be your culprit friend!

hope this helps! NOTE: old TPS sensors get stuck with old age, and dirt. when this happens it will be hard to accelerate or do anything with the vehicle.

Posted on Aug 21, 2017

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 5,359 Answers

May be weak fuel pump or check valve letting residual pressure bleed back to pump . What is the running pressure at idle ? Fuel volume is important also .

Posted on Aug 21, 2017

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

SOURCE: 1989 Grand Marquis 5.0 hesitation under load at 25, 40, 50 mph and slightly rough idle

What happens when you unplug and cap the vacuum line at the EGR valve? Does the problem go away? Before doing this does the car idle rough? If so perhaps the EGR is stuck open...

Posted on Sep 16, 2008

  • 1 Answer

SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

its just white cuz i too the cat off..

cuz i thought my proble could have been to do with the cat...

cuz i lost power driving up hills and on highways now it just will start the die right away

or start and idle really bad...

any ideas???

i was thinking crank sensor.. or injectors

Posted on Oct 01, 2008

joecoolvette
  • 5660 Answers

SOURCE: EGR EVP Sensor

Right on top of the EGR, (Exhaust Gas Recirculation), valve, which is on top of the intake.

Looks like this,
http://fordfuelinjection.com/index.php?p=35

Now, let's talk. The guy's and gal's at the auto parts stores, are just there to sell auto parts, not diagnose cars, pickup trucks, and so on. Nice that they try to help, but an ODB II scanner just shows generic information.

What I'm stating by that, is that you could buy that expensive part, and this may not cure your problem, and/or you could damage your computer if the procedure isn't done correctly.

The P1400 code states,
1.DPF EGR signal circuit shorted to ground
2.DPF EGR signal VREF circuit open
3.DPF EGR sensor is damaged or has failed
4.PCM has failed (Powertrain Control Module)
5.TSB 4-3-1 contains repair information for this trouble code

You need a scanner that is the NGR, (New Generation Star), or has the capability to read
Ford Enhanced Data.

This connects to the PCM in the harness. (It's located on top of the engine) If the procedure isn't done right, you can "Let the smoke out", of the PCM.
You also have to reset the computer to clear the error code.

I know shop time is expensive, but sometimes it leads to less expense in the long run.

Posted on Apr 28, 2009

  • 1 Answer

SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

I had the same problem with my Z when i had it. But it worked when i just left the little hose off of the EGR valve.

Posted on Jun 13, 2009

ZJLimited
  • 17970 Answers

SOURCE: How to replace egr valve on 1995 crown vic 4.6.

On 1995 Crown Victoria the EGR valve is located at the rear of the engine compartment. While the attaching bolts can be gotten out with a little bit of a problem the egr tube that atteches the EGR valve to the right exhaust manifold is a pain. It is possible to do though. Here are the removal and installation instructions. If you are sure that the EGR valve is the reason for any check engine light then you can remove the battery cable for about five minutes to reset the light, but if the light is on for a differant reason then you just got rid of the code plus any freeze frame data that a shop could have used to diagnose the problem.

Check this procedure about REMOVAL & INSTALLATION...

PFED Sensor
See Figures 9, 10, 11 and 12


bcc2045.jpg
Fig. 9: Detach the connector for the DPFE sensor


78e8250.jpg
Fig. 10: Matchmark and remove the vacuum hoses for the DPFE sensor and ...


daae4e4.jpg
Fig. 11: ... remove the retaining nuts from the DPFE sensor and ...


b6fd561.jpg
Fig. 12: ... remove the DPFE sensor from the intake manifold

  1. Disconnect the negative battery cable.
  2. Label and disconnect the wiring harness from the DPFE sensor.
  3. Label and disconnect the vacuum hoses.
  4. Remove the mounting screws and remove the DPFE sensor.
To install:
  1. Position the DPFE sensor and tighten the mounting screws.
  2. Attach all necessary hoses and wiring to the sensor.
  3. Connect the negative battery cable.

EGR Valve Control Solenoid
See Figures 13 through 17


bb3e162.jpg
Fig. 13: Detach the connector for the EVR solenoid


a9fc1b4.jpg
Fig. 14: Match mark the vacuum hoses for the EVR solenoid and ...


57ba344.jpg
Fig. 15: ... remove the vacuum hoses from the EVR solenoid


f5d5cc2.jpg
Fig. 16: Remove the retaining nut for the solenoid and ...


4b98f79.jpg
Fig. 17: ... remove the solenoid from the intake manifold
  1. Disconnect the negative battery cable.
  2. Label and detach the vacuum hoses from the EVR solenoid.
  3. Detach the electrical connector from the solenoid.
  4. Remove the retaining hardware, and remove the solenoid.
To install:
  1. Position the solenoid and install the retaining hardware.
  2. Attach the main emission vacuum control connector and the wiring harness connector to the EVR solenoid.
  3. Connect the negative battery cable.

continue...

Posted on Jul 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 1996 Crown Vic. recently started to buck and backfire a bit, turned out to be a misfire on #4, have been looking into it with a bit of progress but not complete success


I have faced the same thing with my car, this is not a single answer to this problem. It could be a bad boot on the coil pack, it could be a improper coil install, sometimes the spring does not sit in well, it could be that the intake manifold is leaking, it could be that the egr valve is stuck, it could the exhaust manifold is leaking, sometimes these issues are not caught by the OBD 2 sensors, you can try to move the coils around to see if that works out.

Mar 17, 2014 | 1995 Ford Crown Victoria

1 Answer

85 Vic,5.0,CFI,..Was driving home from work (about 25mi) when I got about 4blks from home, she started missing and died. I restarted but it ran rough and died again.I parked it and walked home, had it...


From your description it could be fuel or ignition. Ignition is usually easier to start with and only checking the spark power and quality as the engine dies will indicate what is happening - if anything.

Mar 18, 2017 | 1985 Ford Crown Victoria

1 Answer

What do code 1401 mean for my 2001 Ford crown Victoria police intercepted ?


2001 crown vic, code # po1401. this code has to do with the egr system, the first thing is to check the dpf sensor, this sensor tells computer that the egr valve is working, there are two hoses the run off sensor and go into exhaust lines, check the hoses ,make sure they are on and not split, if hoses are good then start by replacing that sensor. here is a pic of it.and also the hoses86ba1833-6384-4844-833d-84eadda90752.jpg1944c06a-cc52-4fd8-9c4f-ae244e7ad0df.jpg

Jun 29, 2013 | Cars & Trucks

2 Answers

My 95 crown vic temperature gauge wont move,i replaced thermostat,fan works,car runs good and idles good ,temp gauge -no change.mechanic put it on computer,told me it was egr valve.i thought if egr...


your coolant temp sender could be bad. locate the temp sender. this is a 1 wire sensor. the other sensor in the block has 2 wires and starts the cooling fan.

Dec 26, 2017 | 1995 Ford Crown Victoria

1 Answer

How to replace the egr valve position sensor on a 1994 ford crown vic


the positions of the EGR are close, but they are 2 different units. Look on the back of the upper plenum. You will either see a round aluminum item with an orange/red plunger in it that bolts to the 90 degree elbow, or you will see a plate that bolts to the upper plenum itself. The round aluminum one is the EGR Valve for that model. If it has the plate bolted directly to the plenum, that will be the backpressure transducer.

On both models, you will see a round black plastic cylinder unit. That is the EGR solenoid. There will be 2 tubes on it - one to the upper plenum and fuel regulator, and the other to either the EGR Valve or the backpressure transducer.

Either one you have, they are hard to see. They are on the back, and hard to work on. Mine had the EGR Valve on the elbow, and it was tight to get on/off. I found the easiest way to get it taken apart is to take the elbow off, then the EGR valve, and work on it this way. Made things ALOT easier. Just be careful and try not to break the gasket in between the elbow and the upper plenum.

Mar 02, 2011 | 1994 Ford Crown Victoria

1 Answer

96 Crown Vic will not start. Has spark, has fuel, crash button is set, has oil, Will run when fuel start is sprayed into carb. Any ideas ?


Check your fuel pressure to the Injectors at the pressure valve. Then check the wiring to the Injectors to see if they are getting power. Backtrack the Injector wiring if it is dead.

Your Crankshaft and Cam sensors would be working to supply the sparkplugs their power in the firing sequence. You need to check the part that supplies the Injectors their power in sequence.

Usually a bad TPS throttle position sensor will make a "Check Engine" light turn on. This part is on the drivers side of the Airhorn behind all the plastic Air filter ductwork. It has 2 screws and 1 electric connector. Unplug the connector and use an Ohmmeter to watch for resistance to change as you work the accelerator cable attached to the opposite side of the Airhorn. Connect the Ohmmeter to the TPS switch. The Resistance should change if the switch is good. If nothing happens, replace the TPS.

Jan 19, 2011 | 1996 Ford Crown Victoria

1 Answer

I have a 98 Crown Vic, It feels like it has a


Maybe, Ford motors are sensitive to airflow changes, a slow responding MAF can cause delayed signals to real world conditions. An UNDERreporting MAF will ENLEAN the fuel charge as delivered to the injectors. This can feel like or perceived to be a misfire/coil problem, BUT ONLY UNDER A LOAD. Check all PCM inputs, condition of components.What is more logical: EIGHT (8) coils OR EIGHT (8) injectors failing AT THE SAME TIME? I would look at a single component scenario insteadwise, fuel pump? ACT sensor? TPS? EGR solenoids? MAF?

Feb 13, 2010 | 1998 Ford Crown Victoria

1 Answer

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

1 Answer

1989 Grand Marquis 5.0 hesitation under load at 25, 40, 50 mph and slightly rough idle


What happens when you unplug and cap the vacuum line at the EGR valve? Does the problem go away? Before doing this does the car idle rough? If so perhaps the EGR is stuck open...

Jun 30, 2008 | 1989 Ford Crown Victoria

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

79 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

Marvin
Marvin

Level 3 Expert

85020 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

john h

Level 3 Expert

21326 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...