View Full Version : white smoke and rough idle
All right folks I have a problem with my 92 w250 4x4 that I need help with.
The truck has a rough idle and pets out light white/ blueish smoke.
It does this all the time, but is considerably worse when cold.
Even at 'operating temps' the truck will do this. It is also shaking badly on heavy accelaration from dead stop or rolling stop.
It has a new fuel filter/ water sep and had a new lift pump less than 200 miles ago. there does not appear to be any fuel leaks from this work.
Also upon inspection of the inj pump it does not appear to be tampered with and the timing marks are aligned.
does any one have any ideas on what i might d try ??
thanks in advance
03-13-2007, 11:56 AM
Sounds like you might be getting air in your fuel, i would start checking lines from tank to pump. I hve seen one doing that before and it turned out to be a bad line off the tank.
03-13-2007, 05:37 PM
Air in the fuel, or a bad injector.
03-13-2007, 05:43 PM
Post your signature so we know what you have on your truck. Because I'm having this problem as well and I think DC has just came with a flash to fix this?
03-13-2007, 05:44 PM
Uh, TRX24V? You might want to check the first post again. We are talking about a '92.
03-13-2007, 05:49 PM
I know but same problem trying to find a way to fix mine so I'm looking for anything! To help
03-13-2007, 05:52 PM
OK. Not trying to be rude, but this is the forum for '89 to '93 trucks. Most of the guys who post in here (myself included) don't know much about 3rd gen trucks like yours so we probably won't have any good suggestions for you. The guys in the 3rd gen engine and drivetrain forum will have much more useful input for you. :)
03-13-2007, 06:06 PM
Sorry! I will leave you alone......
03-13-2007, 06:11 PM
me thinking some bad washers on some of your injectors take them out have them pop tested at the same time
For the record the truck in question is as I mentioned;
1992 w250 4x4 clubcab auto w/o.d. 3:54's w/ limited slip pw pdl tilt cruise pm seats from a 2001 maroon(rust) and gold paint
straight pipe exhaust 185000 miles
I just got the truck recently and don't believe it has any mods except the seats I put in.
It sounds like I'm gonna have to pony up and pay the pros to check it out.
Since I don't have the equiptment or the knowledge to do it myself I'll just work more at what I do for a living and pay pay pay!!!
The one good thing about being self employeed and not holding down a salaried job, I can work more ....
03-13-2007, 08:24 PM
there is no time like the present to learn dont pay these trucks are pretty simple to work on thats my advise
03-13-2007, 08:56 PM
That's right COAL, ...more talent on this forum than you can shake a stick at. The first post on the forum, AKA "Sticky" is loaded with specific how-to's as well. Get greasy and have some fun, ... [duhhh]
03-13-2007, 08:58 PM
DODGE 92 is right, it's really easy to learn. first off, has it been doing this since you changed the filter? or sometime since then? was it right after a fill up?
03-13-2007, 11:02 PM
water in fuel, bad injector, or mechanical problem with engine. While idling, loosen the injector nuts (one at a time) until fuel starts to spray out, the engine should change tone and it should misfire. If there is no change on only one cylinder, then swap injectors between that hole and another, if the problem changes cylinders and there is fuel at each injector, then you have a bad injector. If swapping injectors does'nt change which hole is dead, then it will need a compression test on that hole. If they all seem to be firing, then look for water in fuel (I would do this first)
03-14-2007, 01:18 AM
I have a 92 thats doing the same thing. Mine did exactly the same thing. The fuel tank has a filter that could be plugged or the return line from engine or the vent line at top of tank. Mine was plugged in the tank. Worse case scenerio, like mine, VE-44 Injection pump is done. Rebuild $800. plus take off and calibrate and install. Close to $1,300-$1,500 out the door.
03-14-2007, 08:21 AM
just a sugestion I had a friend with a 93 that had this problem and it drove us both nuts. it wound up being a secondary fuel filter on the frame just beneath the firewall. I don't know if it was factory or an aftermarket add on but I would definately look
GREAT ADVICE AND TIPS GUYS!!
My statement about work should really have been that I'm slammed with jobs so time is at a premium, but I'll make some time to get covered in grease instead of saw dust over the weekend.
I've got plenty of tools just no diesel specific equiptment.
I've gotten some good ideas here so we'll see what happens.
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