car bucks like a horse

[88ttsupra]

:1zhelpk well my name is jon and i own a 88 turbo supra it has hks super drager catback,2.5 inch hard pipe,blitz bov,greedy dual boost controller,and everything else is stock including down pipe. my problem is that the car wont stop bucking when i try to accelerate :aigo:any thoughts?

 

[suprafanatic]

fuel cut? does it feel like its cutting out or hitting a brick wall almost?

 

[88ttsupra]

yeah like a brick wall,then its up and down until i let back on the throttle,no codes

 

[Zumtizzle]

Boooostttt leak!

 

[88ttsupra]

evrything is replaced except theon right off the turbo but the clamp was tight

 

[suprafanatic]

your hitting fuel cut, at what psi does it start? try lowering the boost and see what happens

 

[88ttsupra]

at 1psi, i took off the boost controller samething happens and i have a new tps

 

[steven89]

evrything is replaced except theon right off the turbo but the clamp was tight

Id check the one off the turbo anyways. .Take it off and look at it. I had one that looked like it was good but had a small crack right where the clamp was.

 

[88ttsupra]

Id check the one off the turbo anyways. .Take it off and look at it. I had one that looked like it was good but had a small crack right where the clamp was.

ok ill do that is it a small coupling or is it a 90 degree peice?

 

[CyFi6]

does your check engine light flash/flicker when it happens?

 

[suprafanatic]

maybe it isn't fuel cut.. if its happening at 1psi..lol however, if he did have a leak like that i wouldnt think it would "buck" like he says it is. i'v had a leak many times and the car just has a lack of power

 

[88ttsupra]

No check engine light.. One code did come up "Code 51" which is neutral safety switch.

 

[suprafanatic]

what about a spark issue? maybe your plugs are going bad, or you might have some already blown

 

[88ttsupra]

Plugs looked fine. I don't think it would buck would it?? Wouldn't it have a miss instead of bucking?

 

[GuNDeZZZ]

Does it feel like its shuddering in the top end???

Sounds like spark breakup...

 

[88ttsupra]

Nope no shuddering... :/ Just bucking.. It goes then dies and then will go again then die.. and it keeps doing that.. Not a TPS either i already bought one and put it on and it didn't stop it..

 

[GuNDeZZZ]

Nope no shuddering... :/ Just bucking.. It goes then dies and then will go again then die.. and it keeps doing that.. Not a TPS either i already bought one and put it on and it didn't stop it..

Bucking like the car is swaying front to back or just shaking during boost?

 

[dumbo]

i would check the hose off the turbo, it sees the most heat. how are you driving the car when this happens? does it due the same idleing/reving?

 

[88ttsupra]

Bucking like the car is swaying front to back or just shaking during boost?

Like the car is swaying front to back..

 

[88ttsupra]

i would check the hose off the turbo, it sees the most heat. how are you driving the car when this happens? does it due the same idleing/reving?

Not idleing jus tryn to accelerate...