Car Sputters While Accelerating

[DOUBL3 D]

Alright so recently anytime i give the car more than part throttle it sputters. The exhaust makes a sputtering sound that accompanies it. I was thinking maybe plug wires or something but im not sure. Also, sometimes if im on it and kick the clutch in really quick while going hard the motor will die.


any suggestions? thanks in advance

 

[bombinuass]

CHECK YOUR CODES. http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

 

[OfnaRcR4]

Timing possibly? Do you have an aftermarket BOV that vents to air? If so that's why your car dies.

 

[mk3<3]

i got the same problem? when im goin hard too and dump the clutch if i dnt keep my rpms up it will die.....some stupid guy that worked in my car took off my stalk bov and closed the line? i guess dats the problem den huh?

 

[Crashoveride]

i got the same problem? when im goin hard too and dump the clutch if i dnt keep my rpms up it will die.....some stupid guy that worked in my car took off my stalk bov and closed the line? i guess dats the problem den huh?

are you driving around without a bov or the stock bypass valve?!?

 

[mk3<3]

yeah he sealed them both up

 

[bombinuass]

dude that is horrible. fix that first thing dont drive your car

 

[DOUBL3 D]

it looks like a stock bypass valve.....ill take a picture of it when i get home and post it

 

[mk3-4-me]

so i know you need a bov. But when you think of it, if we have a recirculated BOV, whats the point? Because no matter what the air is still going to be in our intake system you know. all it does is reroute some of it to a dfferent part of the intake.

 

[Inygknok]

so i know you need a bov. But when you think of it, if we have a recirculated BOV, whats the point? Because no matter what the air is still going to be in our intake system you know. all it does is reroute some of it to a dfferent part of the intake.

The recirculated air goes back to pre-turbo, not post-turbo. Post-turbo wouldn't serve a purpose like you just said, but that's not how it goes. Pre-turbo allows you to recirculate the metered air and prevent compressor surge.

 

[mk3-4-me]

ok ok.. i see.

 

[DOUBL3 D]

any help regarding the stuttering while accelerating? and its a stock looking recirc valve. it sorta sounds like a super sequential but is more quiet...if that helps.

 

[bombinuass]

any help regarding the stuttering while accelerating? and its a stock looking recirc valve. it sorta sounds like a super sequential but is more quiet...if that helps.

i told you to check your codes........ http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx post them up..... cherck your timing too.

 

[allen600]

I have the same problem my timings 10 btdc and no codes

 

[Inygknok]

You guys should check for vac leaks. Missing hoses, hoses that have come loose, worn hoses, hoses not routed correctly, parts not sealing correctly due to worn gaskets or something, etc etc etc. If you don't have engine codes, I'm sure this could be part of the problem, or at least it's a start.

 

[DOUBL3 D]

i have at least four codes. im almost 100% sure its ignition

 

[bioskyline]

how good of shape is your intake piping in? the finnal coupler from throttle body to the 3000 pipe is one that useually craps out first, so check it and see. if any of your hoses feel like a hockey puck, time to replace.

i had a similar issue once and the middle? intake gasket was gone, the one where the upper and lower halfs meet. new gasket and i was good to go.

 

[DOUBL3 D]

ok so i checked and i think i have three codes the codes read as follows (-=light on and _=light off) ___-_-__-__-_-_-__-__-_-_-_-_-__-___ then it loops back. i THINK this means i have code 21,31, and 51 which are oxygen sensor signal (im guessing because previous owner installed test pipe), air flow meter (my apex'i intake?), and switch signal which i think is because i left the car in gear and it will throw this code if you leave it in gear while running diagnostics. the only thing i could think that would be different is how the begenning of the loop would start which would mean i would also throw the code for RPM pulse or something in which case it said check distributor, which would make sense because i thought ignition was my problem. I dont think the loop makes sense though because the last part would make no sense.

any ideas? new plugs and wires will be here friday. does anyone know where a vacuum line/hose diagram might be? thanks in advance

 

[Inygknok]

any ideas? new plugs and wires will be here friday. does anyone know where a vacuum line/hose diagram might be? thanks in advance

Check attachments

 

[D.J.T.]

by sputters do you mean like? when you press the gas rpms go down?? & when you give it even more gas it goes up?? if so its a TIMING ISSUE. happened to me after starting the car after the rebuild.. the timing was WAAY off got it straight & its been running fine.