Forum: 4.0 V6 Tech

my 4.0 at start up and idles fine but if i try to it like it leaned out bad if i put it in park and rev it up some it get better to where i can drive it as i drive it it will get better but its like it does not have the power it should. i have checked and replaced the plugs two times every time...

just curious as to if any of you guys have bypassed the acto pick up any more hp an if you did just curious as to what belt you ran to do so an did you have the underdrive crank pulleys to go along with this thanks im thinking on doing this to my tuck just curious as to how long of belt ill need

I've got an 01 4.0 that developed a starting issue. It starts decent when cold, but when warm you have to cycle the key a few times to start it. If you don't, it just cranks and cranks and cranks. I've replaced the egr valve, dpfe valve, fuel pump, and fuel filter. What's next?

1999 Ford Exploder 2 Door 4x4 Eddie Bauer Edition. There are some things that need to be done to it though. A few rust spots when you open the doors. I checked the frame and it looks extremely solid. I think these rust spots are from the tires though. They are on both sides of the vehicle in...

i have a 4.0 with 267,000 at this time. i have searched and im lost with all the info im wanting to rebuild and do some thing for more power. i still drive it every day and i know its not a v8. so can i reuse my heads and p.p. them or do i need to upgrade them then p.p. them. im going to put a 422...

so i just went to the pump and filled up my truck. drove 5+ miles and looked down to see that neither one of the odometers on the truck were turning. at all....speedo still works fine...just the odom. any suggestions/help?

seems my speedo doesn't want to start working until about 30 mph. And when I slow down to about 30mph it dies again. I have my guesses but wandered if anyone knew what might be causing this?

I'm refreshing my 94 4.0 and I've come across a part that needs replacing but I can't locate a new one anywhere. It's the 'engine damper' it's a shock absorber looking piece that's connected to an arm off the engine mount bracket on the block and the other end mounts to the frame right behind the...

im new to the ford scene been a loyal chevy person for years but i have this 02 ranger which has taken a beaten im ready to make some changes. whats the best way to get some extra power out the motor and are there any problems that i should be worried with about these motors.

Hey guys, I have a 99 Ranger, manual transmission, with the 4.0 OHV, which I recently swapped in from a 00 Explorer (ranger was previously 4.0 as well). When I accelerate I'm getting a rather loud clicking sound - hard to tell where its coming from exactly. It only starts making this sound after...

i just picked up a 99 4.0 with a blown head gasket its been sitting for over a month with anitfreeze in the motor so i was looking into a new one what year blocks fit in my 99 ive read that 95-00 will other say 97-00 any help here?

1999 Ford Ranger XLT Manual 124,000 miles Hey guys, recently swapped an 4.0 ohv (came from a 2000 explorer) into my Ranger. The truck had a 4.0 ohv as well so it was a straight forward swap. Got the truck running a few days ago, but when I drive it a few things are going wrong: 1. After...

Hey guys, I have a quick question just to double check myself. I have an 04 Edge 4.0L and it's acting up in two different ways which may be related, but I'm not sure. The first problem is it often stalls in the morning when I first start it up either right after turning over or as soon as...

post pics of the head work you have done to your 4.0 heads i just got done putting in a few hours in on the bench. dont be shy post away the more knowledge there is out there the better our results. o and by the way the search sucks over here

my '93 4.0 with 130,000+ miles seems to be developing a overheating problem, but its intermitant. yesterday i pulled my 1,000 pound box trailer 25 miles, engine temp was a little higher than normal but not enough to worry much about. later i drove to work, was fine on the way there. when i got to...

only when its in gear, and im accelerating (its a 5 spd). This makes me wonder if it's not the serpentine belt or a pulley, since the belt spins even when in neutral. It also doesn't make the sound when i'm sitting in neutral revving, any help?

well i just am about to wrap up putting my spare motor together and i just noticed that i have pistons that at tdc they are above deck wtf is this normal

I have a little drip coming from the pass side hydraulic tensioner (looks like a big bolt). took it out, and there didnt appear to be a seal (little thin washer) on there. bought a seal from ford, installed, still leaked. took it back out and upon closer inspection, the original seal was still on...

2003 Ford Ranger 4wd with 4.0, only modification is K&N kit. Just not happy with mpg and overall performance, so seeking ideas to help out. I have been thinking of: 1) exhaust upgrade as is stock (not sure what to use), 2) different plugs/wires, 3) computer chip, and 4) MAF upgrade. Looking for...

I have been reading and thinking on what I want to do. Here's what I have and it's all external: Vortek mass air (73mm), Central Coast Throttle Body (63mm) with BIG sample tube, Accel 24lb Injectors, K&N stock replacement filter, 2 1/2 Flowmaster 40 series exhaust. I did have a Jet chip but...

im tired of not knowing how fast im going. my ABS light stays on constanly, if the truck sits in wet weather, just tapping the break locks up the rear breaks, but if its raining while im driving there is no problem. the speedometer and odometer do not work. so today i replaced the speed sensor, no...

Hey guys! I just picked up a 98 explorer sport 4X4 with a 4.0 SOHC and 155,xxx on the clock. It seems to run fine, but are there any common issues I should keep my eyes open for? Any maintenance things that should be done? I'll be using the truck as a bad weather daily/ winter vehicle, and also...

My old 99 ranger is squealing every time u turn it on then stops after it starts up an its pretty Loud I took it to the shop cuz I was to lazy to fix it myself an said it was a cam sensor got it fix but didn't really Fix the problem. If anyone could help me or point me in the right direction that...

Hey guys, I really need your help here. I have a couple of questions. 1. Is there a difference between a 2004 and 2008 4.0 wiring harness? and 2. How much of a difference is there between a 2004 and up 4.0 wiring harness and a 3.0 wiring harness. I noticed there's threre's 3 connections on the...

HI!... I'm in the process of getting a race built 5R55E trans. I want to run a high stall converter in it. Everyone keeps telling me to run a Fuddle Racing one but I can't seem to find them. I used to have a link but it no longer works. Are they still in business? If not, is there anyone else...

Hello, I've got about 12K on my 2009 Ranger Sport/ Auto tranny. When my truck goes into OD and the TC locks the truck now stumbles/ shutters/ jerks, especially with the AC on. In fact with the AC on it's allot worse. I took it to the Dealer and they replaced the #5 spark plug and the problem is not...

I have a 91 Ranger w/4.0. It has had a running problem for quite some time. First of all, when you let up on the gas to slow down it acts like it shuts off. It's a 5-speed, and if you rest your foot on the clutch pedal when you let up on the gas, it doesn't do that. On top of that, it began to act...

i have an 01 ranger with the 4.0 motor and i got a water temp gage and a trans temp gage for on my apiler and i was just wondering if there were any open ports to put those gages in so that i dont lose my stock gages

Hey guys, helping a buddy with a project and need some help. What size is the factory 4.0L SOHC MAF and does anyone swap other Ford OEM MAF sensors? I am trying to find out if a 75mm MAF from a 99 Mustang is the same sensor and if it will mount to his airbox, the connector is the same and they both...

I have a 2003 ford ranger 4.0 that stalled out when i was going slow in reverse. Then wouldn't start for 5 min. Then i went two blocks testing it and it stalled out while i was moving. I waited 5 minutes and it started up and made it home. I didnt drive for a day and now works fine. Drove 20...

i know this is the wrong section but this section will get it answered faster so i have a 97 ford explorer with a 4.0 sohc will one out of a 99 go straight in? ot is there different wiring or what? i need to know as soon as possible please before i go buy the motor out of a 99

I took a small trip today with a friend. ( 140 miles round trip ). a couple times my truck would start then die, and I had to restart with my foot on the gas, to get it to stabalize at 1k RPM b4 shifting or it would die. it had a rough 500 rpm idle for a few stop lights then it was ok for most the...

Will a 4.0 V6 OHV from a 98 Explorer work in a 99 Ranger? What problems might I run into? What parts/tools should I have? Is this something that two young guys with only some car knowledge (but no engine swap experience) can handle? Thanks alot guys! Nathan

My 93 4.0 is gettin to hot it did this about 3 months ago and i changed the thermostat then it ran fine. but i just drove my truck to the dump and its like 2 miles and from my house to there it got all the way to the end of normal then drop backed down it sounds like the thermostat but idk :(...

Hey everyone, First of all I did try searching and googling but didn't find much that seemed helpful to me. I haven't posted in a long time cuz I haven't had a Ranger, but I just picked up an 03 FX4 on the cheap because the previous guy claimed the timing chain skipped a tooth and it bent some...