Welcome to Mustang Evolution.
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07-15-2005, 06:19 PM
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#1
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RPM drop
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Registered User
Join Date: Jun 2004
City: Indianapolis
State: Indiana
Posts: 179
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Ive noticed lately when I brake mild to hard like for a stop light, my engine rpm will drop near or below 500 and begin to do the chug thing like its gonna die. its a manual so I rev it when this happens. do I need to clean my throttle body?? or what might this be (55,000 miles) |
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07-15-2005, 06:28 PM
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#2
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Ero-Sennin
Join Date: Jul 2003
City: Murfreesboro
State: Tennessee
Posts: 4,547
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be sure your clutch is pushed down all the way
__________________
I don't own a mustang at the moment 
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07-15-2005, 06:39 PM
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#3
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,295
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Is your clutch acting up any? Is your a/c on? etc etc.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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07-15-2005, 06:49 PM
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#4
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Registered User
Join Date: Jun 2004
City: Indianapolis
State: Indiana
Posts: 179
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my clutch is fine that I know of, I have a syncro problem with 5th gear but thats it |
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07-15-2005, 06:55 PM
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#5
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what is this bat you speak of?
Join Date: Aug 2003
City: San Angelo
State: Texas
Posts: 1,382
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Clean your IAC. It is what controls your idle speed and a sticky one might do this.
Also, as I am not a Ford guy this may not be relevant, but on EFI Mopars there is a speed senspr connected to the computer. When it starts to fail (wrong pulse counts but not dead) then you get this symptom.
Steve
__________________
1996 Mustang
1965 Barracuda
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07-15-2005, 07:33 PM
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#6
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,124
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clean your maf with some no residue contact cleaner for electrical parts (radio shack or autozone has it) then clean the idle bypass valve, its on the upper intake behind the TB.
See if that helps, do you run your AC? mine idles low if I run it and I am stopped.
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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07-15-2005, 08:20 PM
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#7
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Registered User
Join Date: Jun 2004
City: Indianapolis
State: Indiana
Posts: 179
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my clutch is fine that I know of, I have a syncro problem with 5th gear but thats it |
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07-15-2005, 08:22 PM
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#8
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,295
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Wow...a repost 2 hours later...lol.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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07-15-2005, 08:28 PM
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#9
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Taking life one day at a time
Join Date: May 2003
City: Simpsonville
State: South Carolina
Posts: 10,970
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I would also check for vacuum leaks.
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07-15-2005, 10:06 PM
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#10
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jdm mustang dori
Join Date: Oct 2004
City: Tallahassee
State: Florida
Posts: 2,135
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mine did that for a bit when i put the CAI on. then once the ECU learned the new air flow settings it fixed it.
a few times it stalled me out too :P
so i don't think its clutch related
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07-15-2005, 10:29 PM
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#11
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The 4.2L Guy
Join Date: Nov 2003
City: Scumter; Home: Chicago, IL
State: South Carolina
Posts: 2,030
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I was thinking the same thing. There are few things that would cause Vacuum leaks. A sticky TB plate will cause the TB to stay open a little, so you can check that as well.
__________________
60' ~ 2.1, 1/8 ~ 9.61 @ 73.4mph
Living one day at a time!
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07-15-2005, 10:41 PM
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#12
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Taking life one day at a time
Join Date: May 2003
City: Simpsonville
State: South Carolina
Posts: 10,970
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Also check the hose that goes from the Brake booster to the upper intake. It can dryrot and get brittle and crack.
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07-16-2005, 01:32 PM
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#13
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,124
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mine does the low rpm thing from tiem to time, i clean the maf and it goes back to normal.
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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