Dropping Below 500 Rpm And Starts A Shake

dgt_mustang · November 19th, 2007, 07:34 PM

Going Down The Road, Then Hitting The Brake As Im Coming Up To A Red Light, The Rpm Drops To 500 Or A Little Below And Then Starts To Shake A Little, Anyway I Can Tell What It Is Or Anyway To Visually Check??

Youngin · November 19th, 2007, 07:54 PM

um wow thats crazy ive never seen mine drop below 1k but if your worried take it to a shop and get it inspected

dgt_mustang · November 19th, 2007, 08:16 PM

you dont think theres anything i could try to inspect or anything? no ideas? anyone?

tjames · November 19th, 2007, 08:34 PM

at idle mine is at 700RPMs which is about normal for an 99-04 but 500 or under is way to low. take it to a shop and have it checked out

Kenzo · November 19th, 2007, 08:35 PM

i had that. i seafoamed it twice in 2 days and ran 89-90 octane in it and it dont do that no more

AtlanticBlue99 · November 19th, 2007, 08:36 PM

iac? so you slow down and stop and then the rpms drop, shake, fluctuate but stay around 500 or so?

seems like could be iac

ROUSHME661 · November 19th, 2007, 08:39 PM

mine does the same thing but mines drops so low it turns off ..i replaced the iac and tps but sitll no difference

dgt_mustang · November 19th, 2007, 08:52 PM

Originally Posted by AtlanticBlue99

iac? so you slow down and stop and then the rpms drop, shake, fluctuate but stay around 500 or so?

seems like could be iac

whats the iac? yeah it stays around 500, once i press the gas again though and the rpms go up the shaking of course stops.

99v6stang · November 19th, 2007, 08:56 PM

my car does the same thing, but it is due to my new cam. You are not getting enough fuel at your idle rpms. Have you swapped cams or gotten a tune. You could possilby have a problem with your fuel pump or fuel filter but i have not solved my problem either

AtlanticBlue99 · November 19th, 2007, 09:12 PM

iac = idle air control

scubasteve041186 · November 19th, 2007, 09:53 PM

turn up your idle it shouldn't sit at 500. should be above that.

AtlanticBlue99 · November 19th, 2007, 09:58 PM

his idle is above that, but under the condition he described, his fluctuates and stalls some

Onemanzu · November 19th, 2007, 10:00 PM

check your sensors... does your car have any problems idleing at the start... like setting into idle when you start the car?

and grab some cleaner to make it run better

i had mine done at a shop... they cleaned the O2s the IAT and MAF and IACs all for $30 which is about how much i could buy the supplies for

ROUSHME661 · November 19th, 2007, 10:20 PM

mine just does it once in a while but its still anoyying specially when im just driving and i push my clutch in to coast it for a bit or when coming to a start and just shuts off ..very dangerous so i wanna get it fixed..

scubasteve041186 · November 20th, 2007, 03:31 AM

Going Down The Road, Then Hitting The Brake As Im Coming Up To A Red Light, The Rpm Drops To 500 Or A Little Below And Then Starts To Shake A Little........ yeah it stays around 500, once i press the gas again though and the rpms go up the shaking of course stops.

when it gets around 500 your car starts to stall and it shakes and becomes a bit jerky. like i said turn up the idle or check the IAC like AB said. if its a little old maybe a pvc valve? or some new plugs or fuel filter. but usually shakes are from either.. not enough gas.. or one of your cylinders not igniting in which case your car wouldn;t run very well to begin with. so start with the top and work your way down in options to do.

idle
IAC
PVC
Fuel filter
spark plugs

after that maybe a trouble code might pop up and the check engine light will come on if it sticks around then that will give us a better idea

dark-samurai2 · November 20th, 2007, 05:27 AM

your running retarded lean check you iac and have a shop inspect your 02 sensors. also try using a higher octance gas. for a while.

dark-samurai2 · November 20th, 2007, 05:28 AM

you could also try cleaning your maf sensor. it might just be dirty

ROUSHME661 · November 20th, 2007, 10:16 AM

i noticed the problem when i put on a cai ever sincethen it started so it might be the maf

like i said i jusr replaced the iac and the tps ..the fuel filter is about a month or so old i replaced the whole egr system because my check engine light was on ..so far no trouble codes but my abs light has been on forever but that shouldnt affect my idle..pcv valve was changed on my last oil change which was about a month and a half ut i havent driven it much since then

HMUSN · November 20th, 2007, 10:18 AM

^ your intake has a leak somewhere past the MAF.

that would be my guess.

Darrin · November 20th, 2007, 10:42 AM

Has the car been tuned by anyone? Adding a CAI will often make for lean conditions and a tune can straighten that right up.

Darrin

November 19th, 2007, 07:34 PM	#1
dgt_mustang Enthusiast 01 mustang Join Date: Jun 2007 Location: goose creek Posts: 735	Dropping Below 500 Rpm And Starts A Shake Going Down The Road, Then Hitting The Brake As Im Coming Up To A Red Light, The Rpm Drops To 500 Or A Little Below And Then Starts To Shake A Little, Anyway I Can Tell What It Is Or Anyway To Visually Check?? __________________ LEAVE REP POINTS WHERE NEEDED!!! My Cars: 2001 mustang v6: (slow for now) 1995 Mitsubishi eclipse GSX Turbo: <-ur expression (Fast a hell)

November 19th, 2007, 07:54 PM	#2
Youngin MM Fanatic 2007 Mustang v6 7.86 Join Date: Nov 2006 Location: Santa Monica Posts: 3,069	um wow thats crazy ive never seen mine drop below 1k but if your worried take it to a shop and get it inspected __________________ Black Mustang Organization Official Member #1 ^ HighLight REtarD HATERS CLUB CO-FOUNDER MEMBER #1 [Black Branch Founder] Looking For V6 Hip Hop Artists

November 19th, 2007, 08:16 PM	#3
dgt_mustang Enthusiast 01 mustang Join Date: Jun 2007 Location: goose creek Posts: 735	you dont think theres anything i could try to inspect or anything? no ideas? anyone? __________________ LEAVE REP POINTS WHERE NEEDED!!! My Cars: 2001 mustang v6: (slow for now) 1995 Mitsubishi eclipse GSX Turbo: <-ur expression (Fast a hell)

November 19th, 2007, 08:35 PM	#5
Kenzo Regular Join Date: Aug 2007 Posts: 102	i had that. i seafoamed it twice in 2 days and ran 89-90 octane in it and it dont do that no more __________________ Lake Forest Park 206

November 19th, 2007, 08:36 PM	#6
AtlanticBlue99 Modded Autos Site Mod 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: Evans, GA/Athens, GA Posts: 7,235	iac? so you slow down and stop and then the rpms drop, shake, fluctuate but stay around 500 or so? seems like could be iac __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

November 19th, 2007, 08:39 PM	#7
ROUSHME661 Enthusiast Join Date: Mar 2007 Location: Lamont CA Posts: 660	mine does the same thing but mines drops so low it turns off ..i replaced the iac and tps but sitll no difference __________________ 01 v6 true duals with 40 series flows and custom h pipe cold air intake http://www.myspace.com/xxarsonfreakxx (PERSONAL) http://www.myspace.com/vicious_racing (THE STANG FAMILY)

November 19th, 2007, 08:56 PM	#9
99v6stang Enthusiast Join Date: Dec 2006 Posts: 653	my car does the same thing, but it is due to my new cam. You are not getting enough fuel at your idle rpms. Have you swapped cams or gotten a tune. You could possilby have a problem with your fuel pump or fuel filter but i have not solved my problem either

November 19th, 2007, 09:12 PM	#10
AtlanticBlue99 Modded Autos Site Mod 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: Evans, GA/Athens, GA Posts: 7,235	iac = idle air control __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

November 19th, 2007, 09:53 PM	#11
scubasteve041186 Hardcore Enthusiast 2004 mustang 40th annv. Join Date: Sep 2006 Location: kelowna,BC, Canada Posts: 1,264	turn up your idle it shouldn't sit at 500. should be above that.

November 19th, 2007, 09:58 PM	#12
AtlanticBlue99 Modded Autos Site Mod 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: Evans, GA/Athens, GA Posts: 7,235	his idle is above that, but under the condition he described, his fluctuates and stalls some __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

November 19th, 2007, 10:20 PM	#14
ROUSHME661 Enthusiast Join Date: Mar 2007 Location: Lamont CA Posts: 660	mine just does it once in a while but its still anoyying specially when im just driving and i push my clutch in to coast it for a bit or when coming to a start and just shuts off ..very dangerous so i wanna get it fixed.. __________________ 01 v6 true duals with 40 series flows and custom h pipe cold air intake http://www.myspace.com/xxarsonfreakxx (PERSONAL) http://www.myspace.com/vicious_racing (THE STANG FAMILY)

November 20th, 2007, 10:16 AM	#18
ROUSHME661 Enthusiast Join Date: Mar 2007 Location: Lamont CA Posts: 660	i noticed the problem when i put on a cai ever sincethen it started so it might be the maf like i said i jusr replaced the iac and the tps ..the fuel filter is about a month or so old i replaced the whole egr system because my check engine light was on ..so far no trouble codes but my abs light has been on forever but that shouldnt affect my idle..pcv valve was changed on my last oil change which was about a month and a half ut i havent driven it much since then __________________ 01 v6 true duals with 40 series flows and custom h pipe cold air intake http://www.myspace.com/xxarsonfreakxx (PERSONAL) http://www.myspace.com/vicious_racing (THE STANG FAMILY)

November 20th, 2007, 10:42 AM	#20
Darrin Regular 98 Mustang GT 12.85 Join Date: Nov 2007 Location: Danville, IN Posts: 69	Has the car been tuned by anyone? Adding a CAI will often make for lean conditions and a tune can straighten that right up. Darrin

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