Idle and Driving Issues...Need HELP
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TECH Junkie
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From: Burleson/Ftw,Texas
Its the IAC guys. Checked my TB yesterday afternoon, damn Idle holes were black with gunk, cleaned it out with some BG Intake cleaner and the car didnt buck after 3000K , cranked up the car this morning and it started fine but now it started to hesitate at about 2500 rpms in any gear so I unplugged my IAC and the car runs like a champ, no hesitating or anything. Gonna replace it, with 80K on the clock something had to go
I need to clean mine. My idle has been stuck up at 1500 and then drops down. It was doing it every now and then but it started up again on saturday and has done it everytime I drive the car.
Originally Posted by mellowyellow
If his piston is the case what would have caused it ?
When this happens rings tend to squeeze together. If its a cast ring like a stocker theres not much gap in them from the factory in the first place, they are also high tension rings, and will butt together far more easy then one that is a low tension setup. when this ring butts together there is only one place for it to go. They break or crack the ring land to relieve pressure. This happens on the up stroke of the piston normally. Theres really only one way to find out how serious your motor may be damaged short of tearing into it, a leak down test. If you had an infared gauge you could also hit the primaries and see which one is running hotter or colder then the rest.
Mike
Originally Posted by liftin'em on nittos
if it's a piston and it's something similar to my motor it would probably be a lean condition. i'm not sure what happened in mike's motor though. 408 would be nice, my race car doesn't even get one that big....
My pistons are as black as black can be. I promise i wasnt running lean by now means. Plenty of carbon on my pistons. If it was lean the piston would be pretty damn clean and light gray to white in color.
Mike
Originally Posted by liftin'em on nittos
i have 16 stock pistons and 16 stock rods...2 pistons are pre-holed even. we gotcha covered there if ya need it Darren. but i DID tell ya that LG cam wasn't enough.
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Meh, mike the tq curve on it isnt very curvatious... The few I've seen are flat, then jump around 3500-4k then flatten off...
I have an overlay of a x3 and my f14 somewhere... not too pretty....
I have an overlay of a x3 and my f14 somewhere... not too pretty....
Originally Posted by Brandon
Meh, mike the tq curve on it isnt very curvatious... The few I've seen are flat, then jump around 3500-4k then flatten off...
I have an overlay of a x3 and my f14 somewhere... not too pretty....
I have an overlay of a x3 and my f14 somewhere... not too pretty....
Mike
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From: Burleson/Ftw,Texas
Originally Posted by Ravenous T\A
Its the IAC guys. Checked my TB yesterday afternoon, damn Idle holes were black with gunk, cleaned it out with some BG Intake cleaner and the car didnt buck after 3000K , cranked up the car this morning and it started fine but now it started to hesitate at about 2500 rpms in any gear so I unplugged my IAC and the car runs like a champ, no hesitating or anything. Gonna replace it, with 80K on the clock something had to go
Im gonna plug my IAC back up and unplug the MAF to see if its a Fuel Pump Issue or maybe an Ignition Issue. I think the IAC was compensanting for something, either Bad MAF, Crank Sensor, or Fuel Pump or relay?!?!?!? Damn U GREMLINS LS1 Tech Stories
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Not totally sure how the IAC on the f-body works, but I had a truck that I had idling problems with, and I disconnected the IAC and it idled fine for a while. The engine vacum pulled the IAC closed, however, and then it wouldn't idle at all. Might be something you want to look into.
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TECH Junkie
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From: Burleson/Ftw,Texas
true, might have to replace the IAC, wish I could borrow one and see before I have to shell out the cash for one. If the MAF thing doesnt make it stop im gonna see if I can borrow one from one of the techs at work or see if one of my friends could let me drive on there IAC for a test run.
Originally Posted by Ravenous T\A
Well It started again with the hesitation Im gonna plug my IAC back up and unplug the MAF to see if its a Fuel Pump Issue or maybe an Ignition Issue. I think the IAC was compensanting for something, either Bad MAF, Crank Sensor, or Fuel Pump or relay?!?!?!? Damn U GREMLINS
Im gonna plug my IAC back up and unplug the MAF to see if its a Fuel Pump Issue or maybe an Ignition Issue. I think the IAC was compensanting for something, either Bad MAF, Crank Sensor, or Fuel Pump or relay?!?!?!? Damn U GREMLINS
Originally Posted by 01 Red WS6
Darren I might have an extra IAC on my stock TB. I'll look for the TB and see
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From: Burleson/Ftw,Texas
well i keep thinking its less likely the fuel filter since it is not even a year old yet, watch it be something as dumb as Bad gas. Car ran fine this morning, hung up at 2000 for a sec then dropped back down and didnt repeat. I tried the unplugging the MAF and the car ran like total ***. It was acting like it was loading like a *****.