rough idle

Just picked up a 97 Explorer XLT and she is a beaut! Just over 200k on the clock, and not too much rust (the standards are not high here in Jersey, was looking for something with only surface rust underneath, no gristly crumbly peanut brittle, and this fit the bill). This will mark the 4th one...

So I have recently just purchased an 03 explorer xlt with 148k miles and have been experiencing an idling issue. Haven't really noticed any issues in performance and the transmission is shifting smoothly. I currently don't have a CEL and I have tried running a can of sea foam in the fuel tank to...

Hi there, my name is Seb. I am new to this forum so thank you in advance for your patience and expertise in this matter. I hope I am posting in the correct sub forum as well. * Background: I recently purchased a used 2012 ford Explorer XLT 4WD with 115000 miles on it from a private seller. It...

Hey everyone, sorry I'm really new to this forum, so forgive me if there is a post up already that I may have missed. I have a 96 Ford explorer 4.0 engine that I have been having some trouble with lately. So I noticed the Explorer was rough idling, saw my check engine light that had already been...

1991 Ford Explorer XL (mileage exempt). Alrighty so here is the gist of my problem, when I bought the car the engine was trash, so I had my mechanic install a new motor in her, however he transferred and used all the old electric parts. To the new/used 100,000 mile engine (keep in mind that was...

Hey everyone hope all is well I have another question ik for a fact that I have a vacuum leak somewhere on my 1993 Ford Explorer XLT 4x4 I've replaced the IAC valve and purge valve I can hear air escaping when I turn the truck off and it sometimes doesn't wanna start up it idles rough and it...

Hi all, I've been trying to use this ex as a learning experience for myself, as well as to eventually use as my daily driver. Obviously, for that to be the case, it needs to be running perfectly, and i shouldn't have to worry about it being a danger to myself or others. However, with this...

Took it to ford and paid 1000$ to have nothing fixed and for it to come back with an oil and coolant leak that’s gonna cost me an additional 1000$ to repair from quotes with the initial problem still being present. I don’t have the money. Anybody willing to give me advice that actually has...

'05 XLT V6, ~85k. Truck was suffering from P0430 (Catalyst system efficiency below threshold (Bank 2)) and moderately uneven idle for few years, but yesterday -- peaceful local driving, stopped at intersection, when started moving (no noticeable "pop" or "clang" or whatever) -- engine shaking...

Hey guys, so my father in law has been having bad luck recently where his truck is symptomatic of the notorious rough idle/stalling issues. Being that it is such a typical event he took it to an indy shop for diagnosing and fixing. At the shop they changed the intake manifold with a new one and...

I think I understand the issue related to TSB 15-0149. See video below for my thoughts. Here was a video I made before (Oct 2015) showing the issue but the dealer just said it was a little low on Freon, still seemed to have the issue and then I found the TSB (of course after the warranty...

When i am driving and i come to a stop my Explorer shakes super hard, it's idling rough. I don't know why, anybody have any ideas. I like to fix everything myself and i have big plans for this car. If i can get it to run nicely im gonna keep the original engine. I was thinking about swapping the...

Hi all, I have a 2000 Explorer 4.0L V-6 OHV (X) with the CE light on and codes P0306, P0171, P0174. It starts great runs good but has a rough idle stumbling when warm waiting at a light. It has 198K miles on her but the engine has less than 30K. I've done a lot of work on this truck in the past...

So to start off Im new to working on Ford vehicles. Recently purchased this explorer, it ran well, but its got some miles on it so I decided to give it a once over and do some preventative maintenance. Air filter, oil change, the muffler had a hole in it so i put a new one on, and fixed the...

My 99 explorer 5.0 has CEL P0102 low voltage MAF sensor. I have replaced the sensor, the connector, throttle body sensor, IAC valve, gaskets and checked for vacumm leak although there seems to be a leak i can't find after the MAF sensor. What else can be causing this code? I can't get it smogged...

About 2 months ago I pulled my Explorer out of storage where it has been for the past 3 years while I was in Germany. I flushed all of the fluids and got a new battery, family borrowed mine and lost it. First couple of weeks it ran fine but intermittently it wouldnt start, checked it off to...

Here is what I got: 2006 Eddie Bauer 4x4 4.0 Sohc v6 121,000 Miles Here is what happened: Vehicle overheated due to thermostat housing melted and seam separated. Here is what I've done: Replaced Thermostat housing Radiator Flush and fluid replace Oil Flush and fluid replace Changed PCM,spark...

I have been getting the lean codes for Bank 1 and Bank 2. I clean and replaced MAF. I had previously replaced the famous vacuum elbow (and it's still good). I have had a smoke test done to find any other vacuum leaks. A small amount of smoke came from the EGR, replaced it. The codes have...

Okay, first let me say that I am an Expedition man. I love my Expy. What brings me here is my significant others 1998 Ford Explorer EB 4x4. I guess the only engine put in those was the 4.0 at the time? Anyway, one day she went out to crank it and it would not start. A friend changed the...

Hello, my name is Chris and although I have came here for help with my Explorer for years, I just joined today. Thanks for all the help I've received in the past and will receive in the future. The problem I'm having is rough idle at cold and warm startup. It clears up and runs smooth in less...

It starts up and runs like a champ. But after about 3-5 mins of it running. It starts running really rough and will eventually shut off all on its own. It smells really bad because of it running so rich. Ive already cleaned the snot out of the MAF sensor, knocked out both catalytic converters...

Greetings fellow enthusiasts (and sufferers)! I recently purchased a 01 (98-01) Explorer Eddie Bauer with the seemingly rare gem of a 5.0 V8. She's a beauty and couldn't be happier even with the 198k miles! However. I was in line getting pizza and the dreaded check engine light came on. She...

Hi I am a new member and I just bought an Explorer about 2 weeks ago. I got it, it wasn't quite running well, I pulled the codes up and it was throwing a code for the camshaft position sensor. I did a tune up (spark plugs, wires, oil, all filters), changed camshaft position sensor and the car...

My 2003 Sport Trac with 165k miles has recently started to pulse at idle on a cold start, with the pulses smoothing out with 30 seconds or so. Although the revs hold constant at ~1000rpm, it feels as if someone is pumping the gas. The problem is most pronounced if idling in gear (forward or...

i just changed my IAC valve on my 2002 4.6, i changed it because of rough idle. when i took the old one off it was missing the spring. but now it idles fine and runs smooth. but on startup it revs to almost 3k rpm for about 5 seconds then drops to normal idle rpm. is this normal? kinda freaked...

Stopped at a gas station and afterwards check engine light came on. Throwing code p219a and p0303. Rough idle and drinking some gas. Have had the coils and plugs and injectors checked and cleaned. Everything is running right. Changed the purge valve, still not fixed. Clear the codes and start...

When it's below below freezing outside my explorer has trouble starting and initial rough idle. When I scan for trouble codes I get P0302 which is a misfire on cylinder 2 and a P0316 which is engine misfire detected on startup. Once it's been running for about 30 seconds to a minute the rough...

Okay, so this is a simple question, since my explorer is a 98 the plastic is obviously kinda old. However, the vents are hard to mess with because the close/open knobs like to stick, and moving it up/down and left/right is also hard, cause the plastic just wants to stick together so I feel like...

Dear Explorers, I have been recently facing some issues with my cars drive. On checking the codes through OBD-II reader i can see following codes coming up. P0108 - Manifold Absolute Pressure / Barometric Pressure Circuit High P2195 - O2 Sensor Signal Biased / Stuck Lean Bank 1 Sensor 1 I have...

Hello all. I've just completed a valve cover gasket replacement on my 2002 4.0L SOHC 4WD Explorer, with help from several threads on here. I've gotten everything back together (after hours of messing with the EGR tube), and now I've got a rough idle and a hissing sound from the rear of the...

Let me start by saying, I'm a diesel mechanic and know my way around Powerstrokes, this 4.0 is not what I would usually work on, but I have a friend who has 2006 explorer 4.0L SOHC, someone told him he needed a motor with out explanation why, so I didnt want to see him get ripped off. The...

2003 Mountaineer 4.6. I've posted a few items about assorted issues on this truck in the last month. The truck was running fine, but I recently changed my intake manifold because it was cracked and slightly leaking coolant into cyl. 5 spark plug well. I was a PITA, but I got it done and fired it...

Good morning, Over the last month 1/2 I have been dealing with the "rough engine/shake at idle" issue that many others on here have posted about. I bought this 2005 Explorer from my aunt after my uncle passed last October. It has 118,000 on it now. I want to layout what I have all done thus...

My 2002 explorer has a terrible rough idle and clanking sound. After its running a minute or 2 the RPM's level out just under 1000 but the clanking sound is still there. I'm getting lean codes p0171 and p0174 as well as misfire codes in all 6 cylinders. I've checked for vacuum leaks with carb...

Hello everyone I have a 98 SOHC V6 in the UK and it is running very rough on cold start ups. I've replaced the PCV valve and the idle air control valve which did make a difference, albeit for the engine to rev quite high every time it's started hot or cold. Is there any suggestions on what I...

I need help desperately I have a 97' Explorer Sport (that I love very much) but i cuts out whenever it is put in reverse or sometimes (very rarely) at a red light with my foot on the brake. I got a check engine light once. took it to auto zone and got a code for an air leak. took it to a...

Hello, I have a 2001 Mercury Mountaineer AWD 5.0. When low idle such as backing out of garage or taking off from a stop light I get a rough engine sometimes not always. Less than a year ago I had a mechanic work on it for the same reasons and problem went away. He replaced spark plug wires one...

So i just jumped back into the Explorer game, replacing my old 5.0 with a SOHC 4.0 and after a week am having some issues with cold starts, seemingly random misfires, and a CEL I can't check yet. From the little i know of this engine I'm suspect of intake gasket failures. It runs rough and...

Hello, https://youtu.be/YQkBAC7888U I have been working on my 2001 ford explorer sport truck 4.0l sohc 4wd, 2dr for over 3 months... I bought it with the timing chain ripped, and so they weren't but the guides were so i replaced them, put it back together, timed it at 8 degrees advanced was...

Aloha team, 3 quick questions: 1. Anyone have tips for determining if the PCV hose from the back of the engine is bad? How about replacing it- any easy way to remove/replace? 2. I just replaced intake gaskets - how can I tell if I'm still leaking? 3. Where else to look for a persistent 171...