Gary,
The vacuum line would cause a higher than normal idle, but would not cause a
3000rpm surge when you tap the brakes. While the IAC would try to
compensate (due to the leaner mixture at idle), it's not going create the
problem you're describing. (I've seen this on a few vehicles now.)
Easy test...disconnect the rear tail-lamp harness connectors (one side at a
time) to see which is cause the problem. If either one doesn't change the
problem, it's upstream of the connectors. If one side causes the problem
and the other doesn't...there's the circuit that's having issues.
- Bernd
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Gary Hedlin
Sent: Wednesday, January 12, 2005 9:42 PM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: Very Very Weird Problem
Well, I checked the vaccum lines and the line coming off the TB was cracked.
So I ordered a new one, so we'll see if that helps.
If it doesn't help.... I'm just goanna take it out in the middle of nowhere
and set the SOB on fire! :)
--Gary Hedlin www.garyhedlin.com 2005 Dakota SLT CC 4.7 5spd 1998 Dakota Sport RC 3.9
On 1/12/05 4:51 PM, in article BAY101-DAV1763CD58F3DD318E2D7172D2890@phx.gbl, ""Bernd D. Ratsch"" <fasstdak@hotmail.com> wrote:
> > One thing to remember, there's an idle-up circuit for the throttle > control when you hit the brakes. Ground problem is the most likely culprit. > > - Bernd > > -----Original Message----- > From: owner-dakota-truck@bent.twistedbits.net > [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of > srp@cox.net > Sent: Wednesday, January 12, 2005 9:56 AM > To: dakota-truck@dakota-truck.net > Subject: Re: DML: Very Very Weird Problem > > > Try a new TPS, or IAC--- maybe clean the throttle body for a change? > (on the inside)... Vacuum leak most likely... > > Fix that loose nut behind the steering wheel yet? > > 8^0 > > >> >> From: Gary Hedlin <garyhedlin@sbcglobal.net> >> Date: 2005/01/12 Wed AM 02:20:33 EST >> To: dakota-truck-moderator@bent.twistedbits.net >> Subject: DML: Very Very Weird Problem >> >> >> I need some serious help with my 98! Since the 05 is in the shop, >> I've had to drive the 98 last week & this week. The trouble started >> on > Friday.... >> When the truck is in park and running, the engine will rev up to 3k >> when I hit the brake. Since I had the problem before, I replaced the >> brake switch, but this time it didn't solve the problem. So tonight >> I go to a gas station to get some smokes.....I pull in, put it in >> park, kill the headlights, and leave it run while I go in. When I >> get out, I turn on the headlights and the SOB revs up to 3k again, >> WITHOUT ME TOUCHING THE BRAKE! Then when it goes down to idle I just >> put it into drive, then hit the brake....doesn't do it. >> >> So I'm just wondering what the hell this can be?? I'm getting the >> feeling either the truck is po'ed at me for getting the 05, or I'm in >> for an electrical nightmare. >> >> Any ideas???? >> >> >> -- >> >> Gary Hedlin >> www.garyhedlin.com >> 2005 Dakota SLT CC 4.7 5spd >> 1998 Dakota Sport RC 3.9 >> >> >> >
This archive was generated by hypermail 2b29 : Tue Feb 01 2005 - 00:18:31 EST