Throttle problem, please help

[matt blowen]

Right guys if searched all over but i cant find a definate solution, when driving steady in 1st & 2nd gear say if i lift off the gas pedal the car bucks and and also when i slightly press the throttle it bucks real pain when driving in stop/start traffic. Its asif it happens when the throttle plate closes any ideas thanks,

 

[matt blowen]

I have quite a bit of side to side engine movement, would engine mounts be the main cause of my bucking?

 

[LynxE]

Could it be the throttle body sticking?

 

[matt blowen]

No buddy, cleaned and ive done alignment

 

[s-express]

Try a new MAF first, then if its still happening, remove TB, split and clean up the tracks on the circuit board that the 5 contacts run over - they get a build up of carbon on them and this gives faulty resistance readings to the ecu.

 

[s-express]

off my mrs A2 but you get the idea - the black area is carbon deposits on the 4 tracks (not 5 as previously stated).

 

[matt blowen]

I will try this, thanks

 

[matt blowen]

Do i have to remove the black cover thats on the TB?

 

[s-express]

 

[s-express]

yep you do

 

[matt blowen]

Thats wicked thanks will TB cleaner be ok on the tracks?

 

[matt blowen]

Mine looks different inside, it has a big spring and also a coil spring.

 

[matt blowen]

Ive got stuck in and found 2 small tracks, i have gave them a clean with cotton bud and wynns cleaner, i will report back in the motning with the results

 

[matt blowen]

No change, at least ive learned someting new.

 

[lol4fun]

Mine does the same. Put a new engine mount on and no different. Possibly worn gearbox, bottom arms, drive shafts. Actually have you replaced or poly bushed the dog bone mount? That would cause similar issues and are known to wear out.

 

[matt blowen]

Ive put on a yellow powerflex on the dogbone mount to try and sort this but i dont think it has helped, i might try and tighten the long bolt that compresses the bush? Ill take a look at the bottom arms in the morning

 

[matt blowen]

I dont know of its connected but when i rev the car, as the revs fall just past 2k you can feel the car misfire or bump a little and the exhaust note changes?

 

[16Klappe]

Disconnect the MAF and try again.

 

[matt blowen]

Ive treid running without the maf and it runs lumpy and then dies? I was told this is normal on an agu engine code

 

[16Klappe]

Yep. Totally normal.

 

[matt blowen]

*UPDATE* all sorted just changed my right side engine mount, and it drives spot on