jerking at 50

[Vern]

Help!, when I get to 48-52 mph, my 01 4 cyl. starts jerking, a little faster and it quits, any suggestions?:???:

 

[Bounty__Hunter]

Is the check engine light on? Is the engine jerking or is the steering wheel pulling?

 

[Vern]

The engine is jerking.

 

[jps4jeep]

Thank god this is not a question about senior citizen masterbation.. Jerking at 50..

Never mind


Sounds like fuel delivery issues. is the jerking dictated by speed or by the RPM's?

 

[69jeepcj]

Lol!!!

 

[bugleboy]

oh god you guys corrupted yet another thread lol DIRTY MINDS. but i was thinking the same thing when i read the title lol

 

[benderk]

I have the same it's jerking when rpms go about 2200

 

[Vern]

Dictated by speed.

 

[quantumracer]

Jerking at 50, and being DICtated by speed is illegal in several states!

Ok....fuel flow or timing/spark are the first things that come to mind. Does it happen every time or intermittently?

 

[Vern]

It happens every time.

 

[jps4jeep]

I understand, but does it do it at 48 mph in 3rd and in 4th or just in 4th?

I am still leaning towards a fuel delivery issue. the only other thing I can think of is if there is an exhaust restriction, generally the catalytic converter. it is hard to diognosis over a computer.

 

[benderk]

Both for sure

 

[quantumracer]

Definitely not a cat restriction. I've had that issue and the problem gets worse the faster you go. His problem seems to Occur within a specific speed range, then clear up when he is above it.

 

[benderk]

Well it happens when I don't go slow into 45 and if I rev it more than 2200 over 45 the it jumps at me I think it's the trans but I. Could be wrong

 

[stumblnyj]

Does it go away if you go over 50? If soc heck your U-joints, my rear most u-joint went out and I thought my transmission was gonna blow. it happened around 35-40 but would go away at higher speeds.

 

[Vern]

Between 48-52 in 5th gear, at 48-52 in 4th gear it is ok, 5th above 52 it clears

 

[Vern]

Is it possible the the crankshaft sensor is bad.

 

[stumblnyj]

Really check your U-joints. You need to actually take the driveshaft off to really see if the problem is there. After getting mine off it was my rear u-joint. It had no bearings left in it at all.

 

[quantumracer]

Is it possible the the crankshaft sensor is bad.

I don't believe that's the culprit. When they go bad the engine usually won't run at all. Is there a chance I'm wrong? Sure, but I really don't believe I am.

I gotta ask; when the engine starts to jerk does it feel like it's also losing power, or does it steadily power through the jerking?

 

[Vern]

steadily power through the jerking.