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-   -   iiiiiiii have a probleeemmmmm (

Thebestestdrummer 08-28-2013 01:18 AM

iiiiiiii have a probleeemmmmm
got a little truck overview done when i got my brakes fixed. found out i had a high idle(1100 RPM, they said it should be 600ish) and 1st and 2nd gear were shifting funny, or something like that.

they did something to the tranny to prolong its life a bit, not sure what though, and they installed a new thing( not sure what thats called either) to correct the RPM.

fixed it for a few days, then it started idling at 1100 again.
took it in they replaced that part, hoping it would be a faulty part, free of charge IF it was in fact that part

it worked, for a few days, then shot back up to 1100 again,

they figured it might be a computer issue, so we got the computer replaced
worked for days, then shot back up to 1100...

so alright, what the heck is going on with my truck.. after almost 2k dumped into this truck in the last 2 weeks its still not fixed.

GTyankee 08-28-2013 01:36 AM

sounds like who ever is attempting to fix the issue
is throwing parts at it, hoping to fix it

Thebestestdrummer 08-28-2013 01:47 AM

they're apparently pretty good. We've heard good reviews about them form more than one person. But at this point, i wouldn't disagree.

Gen1dak 08-29-2013 10:44 AM

Increased idle can be due to a vacuum leak. In light of the Magnum's intake plenum gasket, I'd start there.

Thebestestdrummer 08-30-2013 12:00 AM


Originally Posted by Gen1dak (Post 1187606)
Increased idle can be due to a vacuum leak. In light of the Magnum's intake plenum gasket, I'd start there.

alright.. where is the vacuum, and where is this gasket..

if its only a gasket problem I'm about to come unglued on this shop.

Thebestestdrummer 08-30-2013 12:09 AM

here's some other information. i dont know if this is a side effect of the problem. Or if somehow this is the problem.

ive noticed when im driving through my neighborhood at about 20 mph my truck decides it wants to act like its on cruise and pull itself at about 1100 RPM and 20-25 mph by itself. If i hit the brake to about 10 mph to go around a curve, it will slowly pick back up to 20-25mph. It wont speed back up fasssttt, but a noticeable speed for me not hitting the gas at all.

and I'm talking like it will drive itself until it runs out of gas like this. not like its simply coasting down a hill (theres not even a hill, its all flat either way)

to me it just sounds like because its idling at 1100 rpm, the rpms are just taking the car that fast and should be solved when the RPMs get corrected. Possibly? haha


Gen1dak 08-30-2013 02:20 AM

All the little black hoses are vacuum lines. The intake plenum gasket is in the intake manifold. The manifold is a two-piece design (a total piece of crap design). There's a plenum plate that bolts to the bottom and that's where the leak happens. A quick and dirty way to check it is to get up on the engine with a flashlight. Open the throttle and look down into the intake. Shine the light in there and look at the intake floor. Is it shiney (should be) or is it oily/cruddy? If it looks dirty, that's an indication that the gasket is bad and the engine is sucking in crankcase vapors. This upsets the airflow to the cylinders and results in a loss of vacuum. This will cause oil consumption and misfires, rattles from detonation due to a run-lean condition. The worse it leaks, the worse the symptoms get.

Thebestestdrummer 08-30-2013 09:34 AM

if it is crappy looking, how do i fix that?

anothernewb 08-30-2013 09:56 AM

^ how do i fix it.

That's kind of a loaded question. The first response to that is are you mechanically inclined? do you have a decent set of tools? third - do you really want to learn how to do the maintainence?

If the answer to all 3 is yes. Then - not to sound like a turd, but you should really get a repair manual or do some reading on how the eingine systems work. Everyone has to start from somewhere too, so no worries. I remember when I had to ask for help with getting the air filter cover off my first car.

Vaccuum leaks and high idle symptoms sometimes can be quite the beast to diagnose. Sometimes they can come and go and it feels like chasing monkeys hopped up on meth around your truck. It can be anything from a bad MAF to a vaccum leak caused by bad hoses and/or gaskets, bad IAC, bad TPS. I had a bad TPS once that messed up idle AND shifting somehow.

Yes, you cold post question after question and lots of people here would be happy to help you, but the time involved with waiting and going back and forth might drive you insane, not to mention you'd just be throwing parts at it yourself and hoping something sticks.

Having a manual handy and doing a bit of detective work on your end will help us help you make a better diagnosis. Plus, when someone suggests R&R of a part or a system, you'll have a reference to work from.

Now to the meat of the question. If it were me looking at it. first I would check the obvious sources of vaccuum leaks. the hoses, and the gaskets. Since it's a 2001, I'd lean toward the intake gasket as a likely source. next likely a hose, then I'd move onto sensors. Look for cracks, weak spots, soot deposits, kinks in lines. For example: A spray bottle with water can help tons diagnosing a bad gasket. spray the gasket contact area with a mist of water, if the idle suddenly drops. there's your leak. IF nothing happens, move to another area and repeat.

Thebestestdrummer 08-30-2013 10:25 AM

Alright. I'm mechanically inclined enough to take apart the intake and some other stuff. But it really enough to tear apart my engine. Haha. What gasket is it? The gasket by the intake?

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