SRT-4 Sputter Problem

[carton30643]

Hey, my friend has a 04 SRT-4 neon and it has a few mods like GT35R with a mopar cold air intake, aftermarket fuel rail with 1000cc injectors and also a large front mount. Well all of a sudden lately it has developed a sputter at cruising speed or when your just a little on the gas in any gear. Well the plugs have been changed and gapped and the plug wires are fine. I can watch the wideband when it starts to sputter but nothing changes. I also looked at the graph on the S-AFC and it shows the throttle line jumping up and down. Does anyone have any insight to this problem?

[terrytowe22]

g/l try tighting the throttle cable.

[WTF?]

no not throttle cable. does he have a aftermarket fuel pump?, what are the plugs gapped at?, what coil pack is he running?

[CHADbee]

does it rev freely also? if so most likely the TPS sensor. if not then coil pack like WTF said

[TSiFTW]

Was the turbo new when he bought it? Is there any smoke? If nothing is showing on the wideband then more than likely it is not an A/F problem. Pull the intercooler piping apart and check to see if there is any oil in the pipes. Check the plugs and see if they have any oil residue on them. If not check the TPS like has already been stated. Sounds like you are having an ignition issue to me though. Although the coil pack seems fine, under a load like part throttle pulling up a hill your coilpack can start to break up but not that often. Most I've seen either work or not. I'm just trying to give you a few easy things to check first.

[Turbodude06]

does it rev freely also? if so most likely the TPS sensor. if not then coil pack like WTF said

exactly what I was going to say:goodjob:

[stillaneon]

I know mine did that when it was stock. the distibutor and the wires had to be replaced. but it was a recall so they did it for free.

[blackboi50]

does it rev freely also? if so most likely the TPS sensor. if not then coil pack like WTF said

damnnn chad.....i was gonna say that!!

i rmbe anthony (kryptonite) having the same problems!!....1

[WTF?]

I know mine did that when it was stock. the distibutor and the wires had to be replaced. but it was a recall so they did it for free.

:lmfao: :lmfao: :lmfao: sorry i coudnt hold back

[stillaneon]

:lmfao: :lmfao: :lmfao: sorry i coudnt hold back


Shit...

You know what I meant:tongue1:

[CHADbee]

hey my neon wont start, whats wrong with it?

its the TPS sensor.





hey my neon is making this knocking noise in the motor, whats wrong with it?

its the TPS sensor.




hey my neon is stuck in gear, whats wrong with it?

its the TPS sensor.




hey my neon burst into flames then exploded leaving me in a coma for 4 years, now that im awake i want to know what was wrong with it?

its was the TPS sensor AND a boost leak.

[stillaneon]

hey my neon wont start, whats wrong with it?

its the TPS sensor.





hey my neon is making this knocking noise in the motor, whats wrong with it?

its the TPS sensor.




hey my neon is stuck in gear, whats wrong with it?

its the TPS sensor.




hey my neon burst into flames then exploded leaving me in a coma for 4 years, now that im awake i want to know what was wrong with it?

its was the TPS sensor AND a boost leak.

Well that explains everything

[CHADbee]

Well that explains everything
they can be deadly....

[stillaneon]

they can be deadly....

neons in general can be:rolleyes:

[carton30643]

Hey thanks for all your responses. I will check with him and have him check all the things that y'all said. and again thanks!!! I will update when I find out what fixes the problem.

[NickSRT]

Good luck, hope it gets fixed :)

[ueyedgr8tness]

I had same problem mine was coil pack..

[Kason23]

Holy crap 1000CC's on a SAFC?!?!?! Thats why right there.. thats insane for that amount of fuel. You need a flash tune to get the LTFT's right with that much fuel. is there a returnline on it?

Look into a bad injector or o-ring or the intake manifold leaking.

[ueyedgr8tness]

^ great thought i was thinking 1000cc injectors witht that turbo is nice but the tune device is not going to cut it unless he only going to run like 12lbs.But i wouldnt use safc on that srt4 if it was making anything over 330whp just my roockie thought..

[joseph dale]

if not the tps, id check crank sensor... might have burned up or got hot from the downpipe..

[Kason23]

^ great thought i was thinking 1000cc injectors witht that turbo is nice but the tune device is not going to cut it unless he only going to run like 12lbs.But i wouldnt use safc on that srt4 if it was making anything over 330whp just my roockie thought..


Troof... When you use anything over 650's on the stock PCM or even 750s WITH a returnline. Your asking for a word of hurt on a piggyback like a SAFC,DTEC,Emanage. You will not be able to get a good idle let alone a good low trim fuel level for cruising and such. Most no one these days uses them and opts for the DSP,SCT,EMS,AEM FIC. That way you do not increase the timing when you pull fuel. And can have a like stock idle and waaay more reliably

[Turbd4DE]

Holy crap 1000CC's on a SAFC?!?!?! Thats why right there.. thats insane for that amount of fuel. You need a flash tune to get the LTFT's right with that much fuel. is there a returnline on it?

Look into a bad injector or o-ring or the intake manifold leaking.


Thats what I was thinking along with tps.:2cents:

[just a honda]

lol whats wrong with pulling 99% fuel out LOL yeah biggest on safc is like 650's or stage two and with that u would wont a return line.... 1000 with safc lmfao

[just a honda]

hey i will trade u stage twos for ur 1000 it might just fix ur problem..

[carton30643]

Well he told me that he thinks he got hold of some bad gas but I do agree about the car needing a tune and better fuel management. I will keep everyone posted and thanks for all the replies!!!!