Author Topic: rough idle (Read 6455 times)

RabbitJockey · « **on:** October 18, 2006, 06:00:46 pm »

any reasons for a rough idle on a 1.6 td? my car is at 1000-1100 idle and it seems rough, and i know before it seemed fine and i had at liek 700 and i couldn't even feel it, it's not missing or anything and it runs strong... could be injectors or maybe bent valves or something?

sethyboy85 · « **Reply #1 on:** October 18, 2006, 06:25:15 pm »

It's been cool out here lately, glowplug out?

rough warm or rough cold?

What kind of fuel have you been running?

How much boost were your running last night? :wink:

Pull an injector and see if the seal is carboned up (bad spray pattern will result rough idle but smooth driving)

burn_your_money · « **Reply #2 on:** October 18, 2006, 07:02:07 pm »

are all your motor mounts good?

RabbitJockey · « **Reply #3 on:** October 19, 2006, 07:44:59 pm »

i know both trans and the front mount are all good, and the passenger side should be decent as i remember when we did the motor swap, it does it warm and cold, but it's a relatively new thing. so i wouldn't want to think it's the injectors...

burn_your_money · « **Reply #4 on:** October 19, 2006, 07:49:19 pm »

Run a compression check and see if you have a shot cylinder

1slowvw · « **Reply #5 on:** October 20, 2006, 10:09:30 am »

My engine had a really rough idle after i overheated the thing, turns out i had warped the head and scored a piston. The thing ran but it was rough.

1SlowVW

jtanguay · « **Reply #6 on:** October 21, 2006, 09:36:04 pm »

mine went downhill from an overheat too... stupid fan died on me... one reason I hate a/c models...

Powjetta · « **Reply #7 on:** October 23, 2006, 07:32:22 am »

I replaced the front mount and the passenger side mount on mine and it really made a difference. I couldn't tell til I had them out side by side how much tighter the new mount was. If it's just at idle and not when the rpm's are up then I would replace mounts.

RabbitJockey · « **Reply #8 on:** October 25, 2006, 06:07:59 pm »

it could be the motor but this thing runs strong and pulls like a mule, puts a hurting on alot of cars in town haha

jtanguay · « **Reply #9 on:** October 26, 2006, 08:16:43 am »

right before I had my engine fixed from the overheat, it would shake/vibrate pretty bad. it just kept getting worse too

jtanguay · « **Reply #10 on:** October 26, 2006, 05:20:54 pm »

i will add that my older '86 jetta td vibrated pretty bad. we're talking some mad dash vibrations. i thought for sure it would vibrate itself to death :lol: but other than hard cold starting, it just kept purring along! it went to its grave before i could kill it myself though

turbo in that thing was weird too... kicked in at 100km/h and brought me up to 110km/h hehe try explaining that to the officer... and i attribute all of that to bad compression. hopefully your motor doesn't have bad compression

Author Topic: rough idle (Read 6455 times)

1slowvw