High Idle. Trouble code list inside. Im stumped
High Idle. Trouble code list inside. Im stumped Ok bear with me guys this may be long winded as I let you know my symptoms and what I have done as far as trouble shooting so far.
Ok, so I have a 98 Firebird Formula with a 99 LS1 engine. 98 PCM and harness.
Mods: Long tube headers, Rear O2 sims, K&N filter, Magnaflow Cat back.
When I purchased the car the previous owner deleted the AIR/EGR without tuning them out so I reinstalled both.
-Brand new IAC valve installed
-Brand new TPS installed.
No vacuum leaks, pcv system is brand new, intake manifold gaskets are new, throttle body gasket is new.
Symptoms:
Cold starts are crap. The engine will start, idle and chug at about 400 rpm and eventually die. Restart and give it some gas for a few seconds and it will run at around 550-600 rpm....
Here is the kicker though, as the car warms up the idle speed increases. Fully warm it idles at 1100. <<<this drives me crazy and is my main issue.
Here are my trouble codes:
P0133: Bank 1 sensor 1 slow response
P0153: Bank 2 sensor 1 slow response
P0102: MAF sensor circuit low frequency
P1133: Bank 1 sensor 1 Insufficient switching
P1153: Bank 2 sensor 1 Insufficient switching
Ok the last two codes are probably a result of the longtubes. Would any of the other codes cause a high idle situation?
Please help me out guys. Thanks.
Ok, so I have a 98 Firebird Formula with a 99 LS1 engine. 98 PCM and harness.
Mods: Long tube headers, Rear O2 sims, K&N filter, Magnaflow Cat back.
When I purchased the car the previous owner deleted the AIR/EGR without tuning them out so I reinstalled both.
-Brand new IAC valve installed
-Brand new TPS installed.
No vacuum leaks, pcv system is brand new, intake manifold gaskets are new, throttle body gasket is new.
Symptoms:
Cold starts are crap. The engine will start, idle and chug at about 400 rpm and eventually die. Restart and give it some gas for a few seconds and it will run at around 550-600 rpm....
Here is the kicker though, as the car warms up the idle speed increases. Fully warm it idles at 1100. <<<this drives me crazy and is my main issue.
Here are my trouble codes:
P0133: Bank 1 sensor 1 slow response
P0153: Bank 2 sensor 1 slow response
P0102: MAF sensor circuit low frequency
P1133: Bank 1 sensor 1 Insufficient switching
P1153: Bank 2 sensor 1 Insufficient switching
Ok the last two codes are probably a result of the longtubes. Would any of the other codes cause a high idle situation?
Please help me out guys. Thanks.
