vibration/shimmy problem

[militaryman3756]

i drive a 2000 7.3 psd and it just started doing this shimmy/vibration thing today, and the check engine light comes on but then it'll go away and be alright again and the light will go out. any ideas???

[dieselcrawler]

Thoese that know need more info... when does it do this, what are the conditions, speeds, RPMs, etc.... could be alot of things...

I don't know, but I'll bump this up for ya...

[militaryman3756]

well see, the light wasn't on when i cranked it a min ago. but when the light is on, it runs rough all through the rpm range and especially vibratey in 4th. and when i press the gas pedal it takes it a bit to react. i do have a ts 6 pos chip in it, i'm about to take it out and see what that does to it.

[landofconfusion]

no lift or tire size increase?

not to sure other than that, but i'll help you bump also.

[bigcountrysg]

Does the vibration come and go with the light.

[Builttuff]

Im thinking I read on here somewhere that a bad or going bad injector will cause that.

[militaryman3756]

yeah, when the light is on it vibes, when the light is off, it's perfect.

[militaryman3756]

nope, nothing has changed

[jonniebahama]

Im going through the same deal. But now the light stays on all the time. Did you run it low on fuel anytime. There should be a inframe fuel pump under the driverside, try taping on it, or see if you have air in the system. The Dealership wants 200 bucks to tell me whats wrong. i seen a fuel pum on ebay for 83 dollars.. Just start at the tank and check the the filters and line..

[alberta 7.3]

It would help if you could pull some trouble codes with a PSD-compatible reader. If it is an injector issue (as Builttuff mentioned) it could potentially set a P1316 code (IDM/injector codes present) Since this sounds intermittent, and if a 1316 code is spit out, check undervalve cover harnesses and connectors for loose/damage/burned connections, or rubbing wires on pushrods.