By Tyson (Aussie_Disco) on Tuesday, October 23, 2001 - 12:50 am: Edit

My engine at idle reves up and down about 100 rpm. And if you rev it up to about 3600 rpm when is drops back to idle it nearly stalls. Is there anything wrong with my engine or is it just in need of a service?

By Daniel on Tuesday, October 23, 2001 - 10:44 am: Edit

What is the year/mileage?
What has been done in the way of maintenence recently?
These are a few things that might help figure it out.
The first thing that comes to mind is the Throttle position sensor, but I'm no expert.
I'm sure the other information might help narrow it down.
Daniel

By Tyson (Aussie_Disco) on Tuesday, October 23, 2001 - 06:29 pm: Edit

Engine has done 83000km and was last serviced at 68000km, year 1997.

By Daniel on Wednesday, October 24, 2001 - 11:55 am: Edit

Do you have any power loss when driving?

By Andrew Maier (White96disco) on Wednesday, October 24, 2001 - 12:38 pm: Edit

Stepper Motor? See the FAQ/Tech section

By Jorge P. Gutierrez, Jr. (Jpg2esq) on Wednesday, October 24, 2001 - 01:36 pm: Edit

Changed my stepper yesterday in a flash. My 95 no longer stalled and wife said she feels more power.
I was having erratic idle and stalling at lights/heavy traffic.

BTW, I can't believe what the dealers charge for the part and the servicing of steppers.

By Jorge P. Gutierrez, Jr. (Jpg2esq) on Wednesday, October 24, 2001 - 01:37 pm: Edit

Forgot to mention..there are some good posts here about finding cheap steppers. I looked at them and changed mine for 39.99. FOund a Borg Warner at pep Boys. All you need is an adjustable wrench to change it.

By Andrew Maier (White96disco) on Wednesday, October 24, 2001 - 04:11 pm: Edit

Or, if you're like me and a sucker for specialized tools (those you only use for one job): Get a 5.5 mm nut driver.



Andy

By p m on Wednesday, October 24, 2001 - 04:44 pm: Edit

Andy, 7/32" will work.

peter

By Tyson (Aussie_Disco) on Wednesday, October 24, 2001 - 06:45 pm: Edit

lots of power loss

By jp on Saturday, October 27, 2001 - 10:09 am: Edit

sounds like an air leak to me. Mine did it, was a leak in the inlet gasket.

By Mark Phelan on Tuesday, October 30, 2001 - 09:23 pm: Edit

My '96 D1 was doing it and I fixed it by cleaning the butterfly in the air intake. Just sprayed a bit of WD40 on a rag and wiped off all the black sh*t on the butterfly/intake. Now is running smoothly again.

By ephodzen on Thursday, November 01, 2001 - 12:17 am: Edit

IF you have a 96+ disco (4.0L) then don't buy the low cost BOrg Warner Stepper motor. It will not fit. I know, I tried.......

By Will on Saturday, November 10, 2001 - 07:31 pm: Edit

Anyone have the stepper motor part number from pep boys>>>>???

Thanks,

Will

By Will on Tuesday, November 13, 2001 - 05:31 pm: Edit

Part Numbers for 94-95 disco stepper

BORG WARNER Idle Air Control Valve
21738
AC DELCO Idle Air Control Valve
25527077