What is wrong with my car?

[ACiFiC]

I'm having some sort of severe miss firing or something issue, never really experienced anything like this with my car before, the night before i drove it it was having some back firing and spuddering during WOT here is a video, but it is driving worse then it sounds, there is alot of shaking right when i start to push on the pedal. i was thinking coilpacks, but i doubt that they would do this. will start narrowing things down this weekend but help appreciated.

& that snapping is my exhaust.. also an issue, but not likely related.


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[ACiFiC]

Re: What is wrong with my car?

And not throwing any codes.

[Mogobs30th]

Re: What is wrong with my car?

Scan it anyway.

[ACiFiC]

Re: What is wrong with my car?

nothing came up, maybe tomorrow i will torture my car and drive it around till it throws me a code..

[Mogobs30th]

Re: What is wrong with my car?

Could be mechanical. If thats the case, you're going to hope and wish it was something that popped an SES code.

[ssms5411]

Re: What is wrong with my car?

Could be a injector, sometimes it will throw a code sometimes not, mine went on for over a year until we finally found it. Or like said its mechanical and your screwed either way. LOL

[ACiFiC]

Re: What is wrong with my car?

lol thanks steve, comforting, notice the tails? lol

[ssms5411]

Re: What is wrong with my car?

lol thanks steve, comforting, notice the tails? lol

Tails look good , did you have enough to do the front and side markers ? How do you like them?

[ACiFiC]

Re: What is wrong with my car?

i didnt smoke them yet, not sure if i will.

[bwkmaro]

Re: What is wrong with my car?

sounds like a coil to me or plug or injector but cheak in that order

[Red&Black_Attack]

Re: What is wrong with my car?

Sounds like a coil to me also. My car did this when I had a wire off one of the coils.

You can check by pulling a wire from a coil one at a time (NOT while its running, getting shocked by a coil doesnt feel good, lol)and see if it changes when you take the trouble coil wire off. If no change or no obvious coil spark it's likely that puticular coil you pulled the wire off, if it does change then it's probably something else.

[darkflare999]

Re: What is wrong with my car?

sounds like a coil to me also..cuz it almost sounds like your activating launch control

[Rob Bell]

Re: What is wrong with my car?

What you can also try too, is let the car cool down some. Then start it back up. Using a spray bottle, spritz each exhaust outlet and see which one evaporates really slow compared to the others. Then you'll know which cylinder is dead. If two cylinders are dead, see if they match up with the same coil. If it's only one, then you know it's probably not the coil. Then you can check the spark at that plug. If there's spark, pull the plug and check it, if that checks out, then it's probably your injector. To check the injector, use a test light or a voltmeter and check for power pulses on the wiring harness for the injector. If the injector is getting power, and you're getting spark, but the cylinder is dead, then you know you have a bad injector.

[ACiFiC]

Re: What is wrong with my car?

Update: got a bunch of codes now..

p0300 - Random Multiple misfires

DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Fuel Pump Secondary Circuit Low
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

What do i do?

[Mogobs30th]

Re: What is wrong with my car?

Pull a plug or two, and see what it looks like...