i have a 95 f-250 i just replaced the underbody valve cover plugs because they were melted and the truck is still runnin like crap im not building very much boost and the egts are very high, it also is blowing alot of white smoke i have no clue what it could be

 

first off Justin welcome to FTE. Next do you mean you replaced the glow plugs? Or do you mean the wiring harness under the valve cover? Or both? Do you mean you replaced the pigtails under the valve cover? Is that what you mean? I'm just trying to figure out what you did? Does the truck run smooth or is it rough? I'm just trying to figure out what you mean by running like crap. By you saying you're getting high egts I assume you have gauges, yes? What temps are you getting? Do you have the stock downpipe on your truck? Do you have a chip/programmer on your truck?

 

Welcome to FTE.

Like 14PSD said, we need a little more info. What have you changed exactly? White smoke is unburnt fuel so we need to know if this only occurs when it is cold or does it do this after is has been driven for awhile. How easy does it start when it is cold? What mods if any have been performed on this truck. We are here to help, just need more info.

 

ok guys sorry i should have given more info it has a stock down pipe it has a 4 position chip really not shure what kind it is it blows white smoke whether its cold or not. i changed the valve cover gaskets and the pig tails that plug into them it runs reall ruff and the egts just shoot up when i barely accelerate it ran alot worse before i changed them but it didnt start blowing white smoke until after i change them

 

What setting do you have the chip on?
I do not recommend a chip of any kind with the stock downpipe. It is too restrictive and will cause high EGT's.

 

all i know about that chip is that it has high idle and 3 horsepower settings but the truck has had the chip on it for a whike now and its never acted like this

 

justin, like 95 dually said no one on here will recommend a chip with a stock downpipe. Its like having a straw for an exit pipe and a coffee can as your intake pipe = not good. get the picture. Hope so, I'm not being ignorant or anything just blunt, that's just me once in awhile. Next your kitty, is it original? If it is it may need to uuuummmm "fall off" or you may need to get a new one depending on where you live (check some of our signatures). You may be required to have it I don't know. Changing your exhaust will help ALOT trust us on that one. Until you get the exhaust changed I STRONGLY recommend you not put the chip on anything other than stock and high idle. Cuz you can do some major damage if you do. I'm just trying to say you some $$$$$$$$. Unless you are different the the rest of us and made of that stuff. Let us know bud we are here to help. I think that should be a good start for ya. Let us know what else we can help ya with.

 

ok sorry im not givin all the info i dont have a cat or muffler i have stacks on it. really for the exaust i need to get an aftermarket down pipe thats what your saying right?

 

A down pipe won't help with the problem you are having . Are you sure you wired everything correctly?..
Is the CEL on?

Have you check the motor oil level ?..

Have you tested the fuel pressure ?..
Did the problem come on gradually Or all of a sudden ?..

Why did you decide to look at the wiring ?..

Have you tried running it with the ICP sensor unplugged ?...

 

yes everything is wired right i replaced the wiring because the plugs that plug into the valve covers were melted and it just happened all of a sudden

 

Ok guys easy now.. Justin is my cousin!!! WUT UP CUZ?! haha. guys here ya go. the truck has these mods, 6637 intake, 4 position chip. FPR shim, and straight pipe with stacks. the downpipe is not his problem. i guess he installed the guages on it and he knows not to let it go over 1200*. i ran my stock downpipe with stage 1's and tuning and really i only got a 150* drop in EGTs when i put on the 3". . His chip has towing and econo tunes on it from what i can see. the truck does NOT smoke hardly at all. some of you with 10k mods get more smoke than his chip gave him. so this chip is like nothing for his truck. just woke up the throttle a little and gave him probably 40hp. the chip came off a TOW TRUCK that never needed a high performance tune on it. all it did was tow.. literally a tow truck. haha

Justin, did it do this as soon as you put these gaskets and pigtails on?? you can't really cross the injector wiring so that should all be right and i assume Paul or Chris helped you do it so it should all be good. i trust you on that one. are you coming down for thanksgiving so i can look at the truck?? give them all the info on everything you repaired on the truck and what it was doing before vs what it is doing now.

My guess is the wiring on the engine side is damaged. i can give you codys number and maybe he can talk to you further on the wires. And don't worry. the guys on here are good guys and they help a lot. you just gotta give them info. Glad to see ya on the boards. Any more ideas guys would help us a lot!! i haven't dealt with any of the UVH melted yet so i'm unsure of what would cause this

 

also justin if you could let us know what kind of EGTs your running down the highway and your peak boost pressure. your truck should probably only see 15-20psi of boost. low boost is caused by not enough fuel being burnt. now its obvious your not burning your fuel b/c of the white smoke. Where did you get the gaskets and pigtails?? i'm wondering if the wiring is right still... if it wasn't done right and the injectors aren't firing right then there is your problem. also the same would occur if the wires for the UVH(under valve cover harness) on the engine side are damaged.

Have you had the complete performance guys look into it any more???

make sure your oil level is good as Rick is saying and answer all of his questions. your fuel pressure should be good, but check it with a cheap tire pressure guage anyways.

 

Hey Travis thanks for the help of making him think we weren't trying to chew him up. It can feel like that sometimes. Any who, as for the UVH and the wiring harness outside of it remove some of that plastic crap loom stuff. I had some burnt wires in there along with the plugs and had to relpace about two inches of wire, not hard just a PITA. Did you make sure the plug ins on the valve cover gaskets were free from debre/burnt crap. That was part of my problem. The other question Travis I got for ya is how do you check the fuel pressure and not get fuel EVERYWHERE!?

 

if you check the fuel pressure... you need to be ready for fuel to shoot out everywhere!!! put a rag under the shrader valve and press the guage on there very firm like. as soon as you got the read get the guage off fast b/c the slower you move the more fuel your going to spill. putting the rag under there will keep from getting fuel on everything though. haha

 

I was hoping for an easier way without the mess.