first start up of theday,accelaration

[bluewingron]

when i start in the morning,i can rev the engine in park. butwhen i back out of the driveway and go up the road i can hammer it and only get 1200 rpm for about 300 ft. then it will start climbing to 2100 rpms
happen to any one else,got any ideas??

 

[Missouri Mule]

bluewingron,
Not enough fuel or turbo isn't winding up quick enough. As in turbo lag.
Of course I could be way off.
But I don't think lag would last for 300 ft.
Also I think you need to let engine and rest of drive trane to get warmed up a little before you nail it.

Do you have manual or auto? If manual did you notice an slippage?


------------------
Bill Thomas
Missouri Mule - 96 Wht 4X4 ST CC,5 spd, 3. 54, 8 ft bed, 1 ft high cheater boards.
99 Freightliner bl/wht FL60 ISB-5. 9 24v,215 hp,520 tq,6 spd, 3. 59 nsr,16 ft box, 19. 5 tires,Wt/gvw 11,000/23000

[This message has been edited by Missouri Mule (edited 02-17-2001). ]

 

[bluewingron]

thanks for the reply Bill. i have an auto. trans . slow accel. is only in cold weather cant't spool up the torbo a 1000 rpm. but eng. will rev in park and netural.

95 4+4 slt club auto. 3. 54 8'bed two tone green + tan




------------------
Ron Parker

 

[John Dimartino]

Bluewing-why are you trying to get boost and accelerate hard with a cold engine in the first place. Take it easy on it until the temp guage is at or above 140. I never apply full power until its at 180

 

[The patriot]

Bluewingron, I had a similar problem, but it happened at part throttle when cold. I DID step on it hard once, to see what it would do. Could be the same problem as yours.
I still dont know for sure what fixed it, but I'll tell you what I did.

I adjusted the valves. It has 64K miles, and it was due anyway. It did NOT make the problem go away, but it ran smoother, and about 20 RPM faster @ idle.

I replaced the air filter. I used a factory filter because I'm told they stop smaller particles than the K&N's. No different.

I replaced the rubber fuel return line. On my truck this required changing the fuel filter. (I know the filter wasnt what did it, I did the filter about 2000 miles ago)
I think I still have a slight leak coming from the steel line just down from the overflow valve, but it runs 100% better. I also pulled the overflow valve spring, and brought it back to the . 500" spec.

Could be something like a TPS, or weak lift pump. I tried what I did because they were "cheap" fixes, and routine maint. that I skimped on. Not to mention, suggestions from this board.

I hope you get some ideas from this.
Eric
PS welcome aboard!! #ad


[This message has been edited by The patriot (edited 02-18-2001). ]

 

[bluewingron]

to john- not trying for boost just acceleration. i could outrun the truck on foot for 200ft. takes 3 mi to get to 140 deg.

to eric-did a valve adj. at 40 thou have 92 now. have k+n filter. TPS has been changed twice. last tps cured my eng. rpm from jumping up and back 500 rpm,on the highway at 60 to75 mph.

 

[The patriot]

BWR, ever do the fuel return line? You have 92K miles right? If you never did it, I'm sure it's due.
The one time I stepped on it when it was running like this, it belched huge clouds of smoke, and missed like crazy. Kind of like what you'd expect from a gasser that the accelerator pump was messes up in.
My truck would rev in neutral, but with a slight miss(I try like hell not to rev a cold truck) to about 2000 rpm. I didnt rev any further. It only acted this way when cold.
Give it a try. Take you about an hour, and a buck for the part.