Rev/Idle problem Please help!

[yesItsdsm]

So I turn on my car after coming out of Auto-Zone. Idle starts f'ing up. surges up to about 1200 rpms then drops to 500-600 then back up and back down again. So I pull outta the parking lot and in 2nd gear my car starts to stutter horribly. It feels like it bucks when I get on it - at about 4k rpms theres a feeling like the car is pulling back - like as if I downshifted to slow the car down, and then the picks up again and jerks violently. Any ideas? This car is starting to p!ss me off!

 

[yesItsdsm]

Thank you oldman for digging up those links! I saved them to my computer.

 

[yesItsdsm]

also.. The location of that lost sensor plug leads me to beleive that is where my knock sensor would plug into if my car was a turbo model??

 

[ISeeSlowPeople]

Maybe it could be as simple as changing your fuel filter. Sounds to easy I know.

 

[doggo]

Buying all this little stuff for the car here and there is really breaking the bank.. I may have to park my car a couple days and wait on a multimeter. (40 bucks at radioshack?)

Um, who would buy a DVM at the 'Shack anymore- isn't that just an outlet for overpriced RC toys and telephone extension cords?

. Try here only $2-3 dollars usually for a decent working DVM.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=90899

I have two of these around the garage and in car for emergency troubleshooting (and yes, I also love and cherish my $400 True RMS Fluke DVM, which is worth every penny.)

 

[oldman]

Thank you oldman for digging up those links! I saved them to my computer.

No problem, here is the rest of it. http://www.vfaq.com/FAQlocator-index.html

Now go play on the hills behind Sea View Square Mall.

 

[yesItsdsm]

Maybe it could be as simple as changing your fuel filter. Sounds to easy I know.

Already did this

Um, who would buy a DVM at the 'Shack anymore- isn't that just an outlet for overpriced RC toys and telephone extension cords?

. Try here only $2-3 dollars usually for a decent working DVM.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=90899

I have two of these around the garage and in car for emergency troubleshooting (and yes, I also love and cherish my $400 True RMS Fluke DVM), which is worth every penny my ex-employer paid for it).

WTF so how long as this secret been kept! thanks so much.

No problem, here is the rest of it. http://www.vfaq.com/FAQlocator-index.html

Now go play on the hills behind Sea View Square Mall.

its not fixed just yet!

-Nobody knows if the TPS off a 1.8 will work on my car?

 

[yesItsdsm]

SO heres the big update! ...Changed AND Adjusted TPS, problem still persists.

I'm thinkin ECU? CAS? theres a definite misfire so maybe ignition?

 

[yesItsdsm]

anybody?

 

[yesItsdsm]

guess I'm on my own from here on.

<-- how I feel about my car right now.

 

[yesItsdsm]

I pulled out my radio to find out that the ecu in my car is not the original.

Could the ecu be causing this problem?

 

[King_Milo]

Have you checked the distributor yet?

 

[yesItsdsm]

is there way to check to make sure the ignition is firing right at high rpms?

I dont think theres anything wrong with my ignition (if it was wouldn't my car mis-fire all through-out the rpm band?)

 

[yesItsdsm]

I'm getting another engine code. This time it's #24 (vehicle speed sensor). Could this be the root of my problem??

 

[yesItsdsm]

anybody?

 

[merqury]

Any updates on this? Did you try replacing the ISC yet?

 

[King_Milo]

Well mine was the fuel filter, it runs fine now and I believe youve changed that on yours, do you have an updated list of what youve replaced or checked?

 

[yesItsdsm]

I havent replaced the ISC because I dont think fuel cut is associated with that. I have changed the pvc valve, maf, vacuum line to the fpr, fuel filter, tps. My problem still persists and I can smell fuel in my exhuast. I couldnt get my ECU open to check it because the screws were too tight and stripped.

To repeat the problems:
1. Bad idle, seems like a misfire at idle.
2. Fuel cut @ 4-5k rpms at anything above about 60% throttle
3. Fuel smell in the exhuast

*Not to mention my gears are starting to grind more making for a HORRIBLE driving experience all together.

I'm buying a datalogger this weekend so that should lead to more information.

 

[merqury]

Well mine was the fuel filter, it runs fine now and I believe you've changed that on yours

You said it was the ISC that caused all these problems - http://www.dsmtuners.com/forums/showpost.php?p=151089464&postcount=7

I'm interested because I'm having the same 2 problems...idle surge and stuttering past 4-5k. I got a CEL for the ISC so I'm replacing that. But I need to know if that will fix it.

 

[yesItsdsm]

There is a DEFINITE fuel cut around those rpms because I can hear the fuel pump relay click right before it happens.

 

[oldman]

There is a DEFINITE fuel cut around those rpms because I can hear the fuel pump relay click right before it happens.

We are having a meet on Sunday, if you show up with your car I will take a look at it for you.

 

[yesItsdsm]

where is the meet located?

 

[oldman]

http://www.dsmtuners.com/forums/showthread.php?t=250257

 

[yesItsdsm]

I'll be there!

 

[oldman]

I195 west - I295 north - Rt.33 - quakerbridge rd. Should take about an hour but you have a NT so it could be 2.

 

[yesItsdsm]

Cue Bridge Billiards, 3257 Quakerbridge Rd. Trenton NJ.

is this the exact address?

2 hours sounds about right seeing as how can't rev past 4-5k rpms