Snunicycler
Test Drive
- Location
- okc
I havethis weird issue that sometimes presents itself (more often in the cold) overthe last few weeks. I'll be accelerating a bit, and then i'll let off the gas to decelerate and my RPMs will drop very quickly, then spike back up for a split second, thencome back down. Sometimes braking will cause it, other times it just does it onit's own. It didn't really do it much over the weekend but this morning (much colder) it was doing it again. [/FONT][FONT="]
After searching around a bit, I found a few possibilities but I'm leaning towards vacuum leak (maybe?). Recently I had my driver's side Valve cover gasketreplaced, new gasket on intake plenum, and the mechanic cleaned my throttlebody because he said it was pretty gunked up. Ever since then I've had a muchhigher idle (1200-1400 in park when engine is warm, ~950 in drive) and fueleconomy has been suffering a bit.
Does vacuum leak sound like what I should be checking for? If so, is theresomething I should be checking that the mechanic may have damaged while workingon and around the throttle and intake plenum?
2004 XE 4x4 3.3 Naturally Aspirated BTW
Thanks!
EDITED TO ADD: also should mention that i do not currently have any SES codes and I guess I should also mention other things I've found while searching. do any of these sound like they could be the problem instead?
1) Idle air control valve?
2) Throttle Position Sensor?
3) Mass Air Flow Sensor? (I cleaned this when I did my resonator delete a few months ago, no problems until now but I could clean it again if you think I need to)
4) Is there a Idle Relearn procedure (either DIY or @ Dealer) I keep seeing mention of it but can't find anything about it on a 1st gen
Any of that sound more plausible? Also, I wouldn't mind replacing some vacuum hoses since the truck is like, 12 years old at this point, but I don't know which ones to replace is there a list or diagram somewhere that shows all the vacuum hoses?
Thanks!
After searching around a bit, I found a few possibilities but I'm leaning towards vacuum leak (maybe?). Recently I had my driver's side Valve cover gasketreplaced, new gasket on intake plenum, and the mechanic cleaned my throttlebody because he said it was pretty gunked up. Ever since then I've had a muchhigher idle (1200-1400 in park when engine is warm, ~950 in drive) and fueleconomy has been suffering a bit.
Does vacuum leak sound like what I should be checking for? If so, is theresomething I should be checking that the mechanic may have damaged while workingon and around the throttle and intake plenum?
2004 XE 4x4 3.3 Naturally Aspirated BTW
Thanks!
EDITED TO ADD: also should mention that i do not currently have any SES codes and I guess I should also mention other things I've found while searching. do any of these sound like they could be the problem instead?
1) Idle air control valve?
2) Throttle Position Sensor?
3) Mass Air Flow Sensor? (I cleaned this when I did my resonator delete a few months ago, no problems until now but I could clean it again if you think I need to)
4) Is there a Idle Relearn procedure (either DIY or @ Dealer) I keep seeing mention of it but can't find anything about it on a 1st gen
Any of that sound more plausible? Also, I wouldn't mind replacing some vacuum hoses since the truck is like, 12 years old at this point, but I don't know which ones to replace is there a list or diagram somewhere that shows all the vacuum hoses?
Thanks!
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