Rough Idle + 6 Engine Codes Help

Team801 · Jul 1, 2005

Well I put my car back together today and it's running very very bad.

When I start the car it has a very tough time Idling right, at first it's low then it will "rev" up on it's own and stay at a higher idle (around 2-3K) Then drop down again, it is very irritating.

I have the following mods done to it right now.

Mac LT's
Mac O/R H Pipe
Granatelli Big M 90 MAF
70mm TB
C&L Intake plenum
SCT Xcalibrator2 which is tuned for all those mods.

If I Tune it to stock it has 11 Engine codes.

I really don't know where to start, I know it has to be something with the O2 sensors, but what could it be.....could it be a vacum leak???

If someone could please help I'd appreciate it.

I have listed the engine code below.

P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1
P0155 Upstream Heated Oxygen Sensor circuit fault - Bank No. 2.
P0443 EVAP Canister Purge Control Solenoid or Valve Faulty
P1000 OBD-II Monitor Testing Incomplete.
P1409 EGR Vacuum Regulator circuit malfunction
P1451 Lack of Response From Passive Anti-Theft System Module - Engine Disabled

Thanks

JT

csledd · Jul 1, 2005

was that tuned with a mail order tune or on the dyno? Those EGR's can be pretty annoying, I'd definately check for any leaks around that and anywhere else.

Team801 · Jul 1, 2005

It was tuned using mail order Through Modula Madness

Also does ayoneknow where I can find a diagram of all the vacum linesin the car?

9646gt · Jul 1, 2005

Team801 said:
It was tuned using mail order Through Modula Madness

Also does ayoneknow where I can find a diagram of all the vacum linesin the car?

I would contact them and see exactly what changes were made in the tune if I were you!

Team801 · Jul 1, 2005

9646gt said:
I would contact them and see exactly what changes were made in the tune if I were you!

Well if I tune it back to stock the same problem happens, even worse.

I will email them today to see what was done.

02 blk GT · Jul 18, 2005

Its weird because I have some of the exact same codes being thrown....i think they might all be related some how....maybe some kind of relay or something electrical is messed up.

Brandon

BooWFO · Jul 18, 2005

Ok here's my thinking the o2's aren't seeing high enough temps causing the first 2 codes. Are they close enough? Did you or could you perhaps wrap the headers? Also sounds like a vacum leak to me somewhere. Double/triple check everything. Good luck

02 blk GT · Jul 18, 2005

BooWFO said:
Ok here's my thinking the o2's aren't seeing high enough temps causing the first 2 codes. Are they close enough? Did you or could you perhaps wrap the headers? Also sounds like a vacum leak to me somewhere. Double/triple check everything. Good luck

My o2 sensors don't heat up quick enough just driving around....but when i get on the highway they work fine... i have LT headers so they are moved back alittle farther, but it just started this and hasn't always been like that with my headers..i wonder if there is some kind of relay or fuse or sensor that controls the heater circuit and maybe it went out or something? I dunno....

Brandon

urban96 · Jun 14, 2006

im having the same problems!! i need to get this figured out

search function

urban96 · Jun 14, 2006

P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1
P0155 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 2.

P0443 EVAP Canister Purge Control Solenoid or Valve Faulty.

P1409 Electronic Vacuum Regulator Control circuit fault.

^^codes im getting

Stang|ess · Jun 14, 2006

^ start your own thread .

you don't have to worry about the p1000, that will go away after it cycles I believe.

urban96 · Jun 14, 2006

nyuk98gt · Jun 17, 2006

Team801:

Your tuner can adjust an O2 sensor parameter (or two) for the long tubes. One is the delay and should be made larger for LTs. It is possible that the O2 sensors are not getting hot enough because the LT's provide more surface area near the sensors (so the heat is lost more quickly) and the sensors are farther back (gas is cooling off as it travels down the exhaust system). I have read a few threads where people have had to wrap their headers to improve O2 sensor performance. Anyway, ask you tuner about O2 transport delay and LT's and he should be able to fix the problem.

HTH,

Chris

urban96 · Jun 17, 2006

nyuk98gt said:
Team801:

Your tuner can adjust an O2 sensor parameter (or two) for the long tubes. One is the delay and should be made larger for LTs. It is possible that the O2 sensors are not getting hot enough because the LT's provide more surface area near the sensors (so the heat is lost more quickly) and the sensors are farther back (gas is cooling off as it travels down the exhaust system). I have read a few threads where people have had to wrap their headers to improve O2 sensor performance. Anyway, ask you tuner about O2 transport delay and LT's and he should be able to fix the problem.

HTH,

Chris

i have tried stock delay, LT delay and one twice as long as the LT delay and still no luck

urban96 · Jun 18, 2006

ok after looking over some wiring diagrams i found out their connected to the #8 fuse under the stearing wheel labeld engine controls or something like that. from the top my fuse looked fine but when i pulled it sure enough it was toast. replaced it, cleared codes and im back in business

just wanted to post this up incase anyone else has this problem now they have someplace to start

siaphysco · Jun 18, 2006

hey i had the same problem wen i installed my Accufab throttle body and plenum.. wut fixed it was a lil sealent on everything that i put bak on the plenum..plenums and throttle bodys r known for leaking if not sealed correctly.. try this and let me kno how it goes

Rough Idle + 6 Engine Codes Help

Team801

Member

csledd

Official Ovary Punching Member

Team801

Member

9646gt

Member

Team801

Member

02 blk GT

BooWFO

New Member

02 blk GT

urban96

bubb rubb says:"woo woooooo"

urban96

bubb rubb says:"woo woooooo"

Stang|ess

seeking cyber partner(s)

urban96

bubb rubb says:"woo woooooo"

nyuk98gt

urban96

bubb rubb says:"woo woooooo"

urban96

bubb rubb says:"woo woooooo"

siaphysco

New Member

Similar threads

Rough Idle + 6 Engine Codes **Help**

Member

Official Ovary Punching Member

Member

Member

Member

New Member

bubb rubb says:"woo woooooo"

bubb rubb says:"woo woooooo"

seeking cyber partner(s)

bubb rubb says:"woo woooooo"

bubb rubb says:"woo woooooo"

bubb rubb says:"woo woooooo"

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency

Rough Idle + 6 Engine Codes Help