Stone17

iTrader: (3)

Does not happen all the time. When I come to a stop at a red light the RPM will surge up and down. No check engine light right now.

I replaced the MAF sensor because I was getting check engine light P0102.

DougNuts

iTrader: (1)

Have you tried the idle relearn procedure?

Stone17

iTrader: (3)

No. How do you do that?

punishmentcycle

iTrader: (6)

(key off)hold the pedal to the floor..turn the car over with the throttle still on the floor..(car will not start just turn over a few times) let off the pedal and recycle the key.

Stone17

iTrader: (3)

Sweet. Thanks

DougNuts

iTrader: (1)

Lots of good information here: http://www.cadillacfaq.com/faq/index.html

Stone17

iTrader: (3)

I did not know I needed to reset the throttle body. This is my first GM car.

FuzzyLog1c

iTrader: (4)

Interesting. What would happen if the throttle were 95% of the way down when you tried this? Would the car set that throttle position to the new WOT setting? Does any of this interfere with a HP Tuners tune?

cwalker2006

iTrader: (11)

I has that problem when I would turn on the heater or a/c. Just did the relearn and no more surge. Awesome info! Thanks

Stone17

iTrader: (3)

I relearn the idle but she still not running right. Last night the engine shut off when I started her.

kciaccio

On my past vehicles cleaning out the IAC smoothed out my idle.

punishmentcycle

iTrader: (6)

dis connect the battery for about 20 minutes.( longer the better) start her up and take it for a 5 minute drive to get any codes to come up.( if no CEL, still put a scanner on it) and tell me what u get for codes

Stone17

iTrader: (3)

I check the code and nothing. Pulled the battery last week and it help a lot but the car still drop idle once a day (not all the time just coming off the freeway and coming to a stop).

I'm going to my friends house today and he going to scan the car and check the sensors.

Stone17

iTrader: (3)

Good ideas. Did not think about that.

Stone17

iTrader: (3)

No check engine light but the only code the car is showing is P0102. That code was set off about 200 miles ago and nothing since.

My friend has a Snap On Modis Scanner. He check all the sensor and nothing. Everything works fine. Nothing was wrong. After I left his house the car started to act up.
He thinks is the TB or throttle pedal.

One thing he did see was when you keep the throttle at 2,000 rpm for 30 second or more. The computer will drop the RPM down and bring it back up.

kl2onik

iTrader: (3)

Tell me what you find cause I also get surge when I start up before the car is at running temp. Used to get codes before I changed the maf. Ever since I changed it haven't had a code. 500miles post new maf here but still that darn surge on a cold block.

54inches

iTrader: (4)

I would replace the cam.

Stone17

iTrader: (3)

Under power I have a misfire on cylinder 1, 3, 4 and 5.

punishmentcycle

iTrader: (6)

Under power as in during acceleration? Have u pulled the plugs to see if any are fouled? When was the last time u changed ur fuel filter?

DMM

Sounds like your V is no longer subservient, you need to reestablish your male dominance and quickly! Bang the wife on the hood...a couple Chuck Norris posters couldn't hurt.

Your MAF may be on the way out...P0102 is a MAF low frequency DTC so it is possible to fail within range, causing secondary issue's. Disconnect the MAF (will set a DTC and turn the light on) to force fail over to the MAP sensor and see if things improve. Could possibly be a crank sensor as well given the age.