tank86
Full Access Member
i havent a clue at this point
Riddle me this...?
- Thread starter tank86
- Start date
had this problem on my 04',like a bucking bronc.it was the throttle position sensor.
tank86
Full Access Member
I've got the TPS out now. It idles perfect tho at 700rpms. Just rough internal banging
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
What do you mean TPS is out? Still no codes when you cycle key bro? Have you disconnected/reconnected battery
tank86
Full Access Member
just disconnected, reconnected battery. pulled a few plugs to see if they looked foul. all looked good. AF ratio still bouncing at idle after start up. I had to TPS out to clean. put it back in. Idles fine. No codes whatsoever. Still bucks. I haven't driven it yet around town since messing with all that. I have been up since 2pm yesterday. I am wearing down.
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VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
Yeah you're stressing yourself bud. Did you replace cam sensor or pull it out to check it? The new sensor has to be just perfect installed against high spot on cam gear. First start it will shear 1mm off tip of cam sensor to set air gap needed to monitor cam pulse.
tank86
Full Access Member
brand new one. set it at the high point. if it sheered, would all hell be breaking loose right now? i really dont want to pull it out to check it.
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
No if it sheared it won't run. But if gap wasn't set right on new one, it will run but bad. Is it still running exactly like before sensor change?
tank86
Full Access Member
a tad better, but not by much.
tank86
Full Access Member
There's 4 damn 02 sensors for these things? 2 downstream and 2 upstream?!
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
You only need two upstream bud
Like Scott said you only need the 2 upstream. you can completely disconnect the rear 2
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
Well if you disconnect you'll get a Check Engine light. If you remove from steam and fill bungholes with plugs and strap sensors to frame or tranny you're golden
Arska2
EU Moderator
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
I knew that wAs coming, I catch hell about it often. Threaded bushing plug..... To be politically correct, lmao
tank86
Full Access Member
I always keep my bungholes filled with plugs.
tank86
Full Access Member
Changed out the spark plugs with champions. Got 2 Bosch o2 sensors on the way. P/N 15504 and 15505 ($60 total at RockAuto, not bad). Doesn't run as rough now. At idle you can tell every once in a while. AF ratio will be between 14.6-15.3 and then jump up to 16.Xish for a flash second. And sounds a little off... like there is still something minor going on in there.
seethrough
Member
I think this is the answer. IAC acts like a choke so when the engine is cold the extra air is compensated by the computer. After engine is warmed up the engine shuts the IAC but if it doesn't close engine gets unmetered air and creates a lean condition that can cause stumbling and hesitation.
tank86
Full Access Member
I cleaned the IAC yesterday too while I was in there. It isn't idling funny. It sticks right at 700 RPMs, but just "dogs out" It did fine today, drove it around for a few stops. Went to the gym and started it up and it started rocking and bumping. Sat at 500 RPMS, even after i had the pedal floored.... pop pop pop, and then when it caught the RPMs shot up like they were supposed to.
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