February 28, 2011Ok I searched through all the old post but didn`t see anything that refers to my problem. I just did a tune up (spark plugs, cap, rotor, wires) truck was running fine didn`t have any problems. Went down the road and when I had to put the truck in reverse it sputters and the rpms were going up and down. When I put the truck in drive it was fine. I can go outside start my truck up and it sits there and idles at 650 rpm. I can put it in drive and sit there and it idles, I put it in reverse and it stalls.Anyone have this problem in the past or have any idea where to start checking??
February 28, 2011Also let me add that right before doing my first post, I went out started the truck, made sure that it was still doing it and checked for any codes. I know on some vehicles the TPS and MAS done`t throw the check engine light on. I am code free. I want to say that it didn`t do that till after the truck was warm so now I`m waiting for it to cool off and I`m going to go back out and run it again.
February 28, 2011Ok went out temp was almost all the way down, so I started the truck up and it idles in park,neutral, and drive ok. It had one small hick-up in reverse then ran fine. I popped the hood was looking for anything not right and didn`t see any broken vac lines or something unplugged. Got back in the truck and temp was up about normal, put in reverse and it started acting up and wanting to stall. It`s only does it in reverse and after the temp is about 130 degrees since that`s the bottom temp on the guage.
March 1, 2011Any idea`s ???
March 1, 2011Man I wish I could help, but I haven`t got a clue. I know that someone out there has at least heard of this before.
March 1, 2011I`ve been given some suggestions such as egr or vac leak. So I`m going to go and check those. I`ve also been told sticky valve in the trans, but I was told that about it not shifting right by one mechanic and another fixed the problem by checking the detent cable.
March 1, 2011I read in another forum where the guy had a simular problem and it was the crankshaft position sensor ... anyone know if this will make the truck stall in reverse??
March 1, 2011Are you sure the timing didnt get bumped a little?
March 1, 2011Don`t know how the timing would be an issue. The rotor has a slot that it goes on so it can`t be on wrong. Also if the timing got bumped it would be an issue in all the gears not just reverse, wouldn`t it? The truck idles at 650 rpm, that`s the way it`s been since I got it and the distributor wasn`t messed with except replacing cap and rotor. The only other time I had a stalling issue was when the downstream o2 sensor was bad and that was just replaced.
March 2, 2011ok update on the in-mobile skunk. I shot it .... joking. Here are the symptoms that it was having:
1. engine stalls in reverse when engine is warm
2. engine doesn`t stall while driving or stopped
3. engine will idle in every gear but reverse
4. engine stall only happens after engine begins to warm up, the hotter it is the faster it stalls in reverse (ie. temp above 130 sputters, temp 180 stalls right out)
5. No check engine light, no pending codes, no miss, no hesitation while driving, idles @ 650 rpm, idle is constant in drive with no fluctuation.
Now I saw that the TB was all gunked up and full of carbon. I went pulled it off, cleaned it completely up and replaced the IAC. I reinstalled and then played with the truck in the back yard. Not once did it stall or attempt to stall in reverse. I ran it long enough to cycle the thermostat twice. All I have to do is take it for a road test now and see if anything happens there. I also got a new crankshaft position sensor that I`m going to put on later. But hopefully the problem is solved. I`m adding pics to my gallery of the TB and a shirt that I put the carboned gunk on ... nasty looking. Haven`t seen one like that in a long time.
March 2, 2011Put the pics of the TB in my gallery now. One thing that I would like to say is that the engine wouldn`t stall while it was cold. I had no problems with reverse when I moved it from the front yard to the back. So hopefully I don`t run into anything now. After re-installation the motor did seem to run better, now maybe my gas mileage will go up just a tad if this solved the problem.