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98 Ford van lunges and surges continuously.

My 98 Ford E-150 van surges and lunges as it idles in drive. While cruising, it is not running smooth. I found some vacuum leaks, and it helped a little, but now it seems to be getting worse. It doesn't stall, but at times the idle is hauntingly low. If I don't have my foot heavy on the break, my van will lunge, lunge, lunge, as it idles in drive. It is so bad, that one could become sea sick.

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6ya6ya
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Posted on Jan 02, 2017

scrodamoon
  • 659 Answers

SOURCE: Gas pedal slow to respond

the carb been checked over? or fuel pump?

Posted on Aug 04, 2008

  • 1 Answer

SOURCE: Rough idle

I took mine in to change the plugs and they said there are four O2 sensors in the fuel mixture system and two were bad. I didn't replace them since they were a little pricey ($500 to replace both) and I have 103,000 on the car. Has very similar roughness and occasional oscillations, but no stalling. Hope this helps.

Posted on Aug 25, 2008

  • 14 Answers

SOURCE: 1995 Chev S10 4.3L V6 rough idle and under power

This make/model has a chronic problem with EGR clogging. If you have a dashboard indicator showing "check engine" most likely it is a trouble code indicating and EGR (exhaust gas recirculator) valve problem. Symptoms are rough idle, and surging and stalls.

What happens is sediments from the exaust manifold get sucked up into the valve when it opens, then stick in the valve and keep it from closing. When the valve is open when it should be closed, the engine runs very rough.

I removed my egr and then dislodged the sediment (pea-sized debris) and then re-installed the valve. Three days later, the same "check engine" and same rough idle. I must have did this at least three or four more times.

What I found that gave me a permanent solution was an aftermarket filter gasket that keeps debris from clogging. I don't remember the name of the product, but a search for "EGR filter gasket" may lead you to the product.

Install the gasket between the EGR and the exhaust manifold and you should be good to go. Note: on 1995 and newer models, disconnecting the EGR from the wiring harness (common on R&R) may require the computer to be reprogramed.

Posted on Dec 24, 2008

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SOURCE: 90 honda accord lunges forward at 20-30 mph.

It is not the motor mounts causing the problem, although given the age of the vehicle they may need to be looked at. Your transmission is slipping. Check your fluid level, and check for discoloration and odor. Overfilling a transmission will also cause slipping. If you don't know when the filter and fluid were last changed, it is probably overdue. This is a really messy job that is worth paying $75-$100 to a reputable shop to let them handle. The bands will probably need to be adjusted too, which is why it is a good idea to take it to a shop. Some of them will bring the pan out to you to show you the sooty looking material at the bottom, which is perfectly normal. What to look for is large chunks of metal or clutch disc material. If you see either, start saving for a transmission rebuild. I am not sure what flashing lights and speed sensor you are talking about. Are the headlights or dash lights flickering, or is it the police car lights in your rear view mirror? If it is the first, check your connections, your alternator output, and have your battery tested. If it is the second, think of a convincing lie but be prepared to throw yourself on the mercy of the court.

Posted on Feb 13, 2009

  • 5 Answers

SOURCE: surging while idling in gear...2001 Ford Windstar

check the swiches at the brake pedal their should be two. one for brake lights and one for transmission dump valve it prevents the engine from loading up at lower rpm. ie stoping at lights while in drive

Posted on Apr 03, 2009

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2 Answers

Why 98 accord surges unexpectedly at times


idle air control valve is dirty or fast idle thermo valve is not working correct idle air control is behind the air Pentium fast thermo is below throttle body cb1c9bed-96f3-47b7-87d5-98b7565539c2.jpg 8f6c0296-ecdc-41e5-a952-8dd215261a1e.jpg

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I have a 1994 ford explorer ,it will idle up and down and it surges when driving,during warm months it wont idle good after its getting colder it idles up and down i can cruise 45 mile an hour and never...


When idles surges its due to false air, The MAF (mass air flow) calculates the amount of air and responds to the proper amount of fuel, When you get false air such as a broken PCV valve,or ruptured vacuum hose the idle increases and you get the surge that you are describing,Your basically out of fuel control .

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98 626 2.0 run idles but lungges and won't excelerate will idle. changed ecu not that


Check the air intake boot between the air cleaner and engine. It is a black rubber, accordian looking tube. Check the accordion tube area and down in the grooves for any tears that would allow unfiltered and unmetered air into the engine. Tube can look fine just sitting there but when trying to accelerate the engine torque will allow engine to move and open up the tear causing a lunging or surging feel on acceleration but not at idle.

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Looking for torg specs on tire lug nuts on a 15passenger van f350


Hello there
FORD TRUCK
Wheel Nut Torque Specifications
Make/Model Description Years Torque Make/Model Description Years Torque
FORD (continued)
FORD TRUCK
E250 Van 8 Lug, 9/16" 2008-88 140 -160 ft lbs
E350 Van 8 Lug, 9/16" 2008-88 140 -160 ft lbs
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F150 Pickup 21mm Hex 2000 150
F150 Pickup - 1999-88 100
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Feb 01, 2011 | 2008 Ford F-350

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We have a 1989 ford 150 van 351 and it idle very


idle air control valve needs replaced loaded up with carbon

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I have a 2002 Ford F-150... it started accelerating as soon as i turn it on... it accelerates uncontrolably..


1) Check throttle cable/linkage for smooth operation. 2) The PCM may have failed. See dealer/mechanic. 3) Vacuum leak(s) at manifold or vac. lines.

(I had a fast idle and surging cruise all of a sudden. The diaphragm of the EGR valve started leaking.)

Sep 30, 2009 | 2002 Ford F150 Regular Cab

1 Answer

Running rough


You need to see if you have any codes in computer, it may lead you in the right direction. That being said it sounds like you either have a idle control valve issue or a vaccum leak but I would see if you have any codes first. You can have codes without engine lamp on.

Aug 25, 2009 | Ford E-150 Cars & Trucks

1 Answer

1983 Ford 150 6 cyl...Starts easy, idles relatively smooth, runs good up to 50 - 55 then when given more throttle engine starts to surge and can't get over 60. Would appreciate any thoughts on this.


Install a fuel pressure gauge on the system. Run the engine up to the problem speed and watch to see if the fuel pressure drops down. If it does, replace the fuel filter and re-test. If the fuel pressure still drops, replace the fuel pump.
Another possibility is a partially clogged catalytic converter.
Charlie

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It sounds like an automatic choke system. Let it warm up for 5 minutes and then give it gas up to 2000rpm and release.

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