jerking when going highway speeds
Racetracks
Joined: Nov 2002
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From: How long is a piece of string?
Re: jerking when going highway speeds
Check all of the power and ground connections also, it's possible that contact could be interrupted just long enough to create a hickup but not long enough to reset the ECU or stall the engine.. So many possibilities..
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c'mon
Joined: May 2005
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From: Chesapeake
Re: jerking when going highway speeds
May be a loose coupler in the intake system, or some other type of intake leak. If you have an engine with a MAF, any leak that is between the MAF and the engine can cause glitches. Once you measure the airmass with the MAF, any air that is lost or gained can make glitches because the engine isn't getting what the ECU has already predicted.
There are other possibilities too, it's going to be something mechanical though probably because of the bumpy road stuff. Check that you don't have any cracked spark plugs, and that your plug wires are making proper (tight) contact and don't lose continuity when wiggled, etc.. This is going to be a fun thing to track down, make no mistake...
There are other possibilities too, it's going to be something mechanical though probably because of the bumpy road stuff. Check that you don't have any cracked spark plugs, and that your plug wires are making proper (tight) contact and don't lose continuity when wiggled, etc.. This is going to be a fun thing to track down, make no mistake...
Racetracks
Joined: Nov 2002
Posts: 15,668
Likes: 0
From: How long is a piece of string?
Re: jerking when going highway speeds
A vac gauge should work, it's tough to tell if it would be to respond fast enough to register any abrupt changes when you went over a bump, etc. I would be surprised if that is the problem though, this is probably something bigger that can really make a hiccup. I'm talking a loose hose coupler or something like that. Anyway there are a lot of things that it could be, and an OBD2 scanner could tell some things if you can replicate the problem with the scanner attached. You might be able to see a sudden change in pressure, etc., that could point you to some possible causes.
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c'mon
Joined: May 2005
Posts: 2,440
Likes: 0
From: Chesapeake
Re: jerking when going highway speeds
A vac gauge should work, it's tough to tell if it would be to respond fast enough to register any abrupt changes when you went over a bump, etc. I would be surprised if that is the problem though, this is probably something bigger that can really make a hiccup. I'm talking a loose hose coupler or something like that. Anyway there are a lot of things that it could be, and an OBD2 scanner could tell some things if you can replicate the problem with the scanner attached. You might be able to see a sudden change in pressure, etc., that could point you to some possible causes.
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