SPONSORED LINKS

Van bucking when accelerating

Tiny
ANDDOR10
  • MEMBER
  • 1998 FORD E-SERIES VAN
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
When accelerating at around 35 to 45-MPH van starts to stumble mainly going up hills. It feels like a misfire, but it shows no codes. Initially I had a code on a misfire on cylinder 8. The coil seemed loose, so I tightened up a little. The code went away but the problem still exists.

Thanks for your input.
SPONSORED LINKS
Tuesday, October 26th, 2021 AT 4:08 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
There are two things that I have seen with this type of issue if it is not a misfire.

First is fuel pressure. We need to hook the fuel pressure gauge up and tape it to the window and drive the vehicle so that we can watch the pressure.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

The pressure should remain steady and not jump around by more than a couple PSI.

Next is to drive the vehicle in manual gears so that we can try and eliminate the torque converter from shuttering. If you have an overdrive button, try pressing it and see if the jerking stops.

If it does then we have a converter clutch slipping and it can feel just like a misfire.

Let's start with this info and go from there. Thanks
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, October 26th, 2021 AT 4:49 PM

Please login or register to post a reply.

Related Engine Hesitate Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Hesitation
GUIDE
Hesitation
An engine hesitation is an interruption of continuous power during acceleration. When a engine is hesitating it will cause the car to lunge or surge which will cause a...
VIEW MORE

Sponsored links