Hell, yawant my old MAP sensor? Still works...just a spare.
- Bernd
----- Original Message -----
From: "Barret, Matt" <MATT_BARRET@earthtech.com>
To: <dakota-truck@buffnet.net>
Sent: Wednesday, August 16, 2000 12:35 PM
Subject: RE: DML: RE: Re: RE: RE: cooling fan
> Jon, thanks for your technical insight, with everyone's help I feel like
I'm
> am "narrowing" the field of culprits! I took delivery on the truck last
> October, so this is really the first summer for the truck. The problem
only
> seems to occur under high temps, say 85 and up with high humidity. Doesn't
> always happen, but seems to be happening more frequently now. Only recent
> mod was the cat back system, but the problem originated prior to that
> install.
> Thanks!
> Matt
>
> -----Original Message-----
> From: Jon [mailto:jon@twistedbits.net]
> Sent: Wednesday, August 16, 2000 12:26 PM
> To: 'dakota-truck@buffnet.net'
> Subject: RE: DML: RE: Re: RE: RE: cooling fan
>
>
>
>
> On Wed, 16 Aug 2000, Barret, Matt wrote:
>
> > Ted, I'm not 100% sure its the PCM overheating but the symptoms are
> > fuel/spark cut off during hot weather, under WOT after I shift (5spd)
and
> > then smash the gas back to the floor the computer is cutting the fuel
and
> or
> > spark. Letting the truck cool down is a temp. cure.
> > I'm leaning toward possibly a faulty connect somewhere, that expands
under
> > extreme heat. possibly the TPS. I'm also wondering if under extreme
temp
> > the TPS is unable to get a proper reading because I'm slamming the gas
> pedal
> > down to the floor so quick it doesn't know what to do??
> > hmmmmm???? I'm gonna figure this damn thing out if it kills me!!!
>
> Matt,
>
> ~ Here's another thing to consider; I could be way off base, but figured
> ~I'd mention it anyway. I believe a major sensor that the computer
> ~uses to determine engine load is the MAP. When you're up in the rpms
> ~with the pedal to the metal, and you hit the clutch, it seems like
> ~the engine load would go from fairly high to almost nil immediately.
> ~I'm not sure why the engine would cut fuel and spark, but the MAP
> ~sensor may be something else to look at. I think you're on the right
> ~track, I'd probably look at sensors that experience a high delta when
> ~the problem occurs. The TPS is obviously one, the MAP may be another.
> ~If you can borrow someone else's sensors I'd probaby try that, looking
> ~for a loose connection may help also.
>
> ~ Is this something that has happened recently, or has it always done
> ~this in hot weather? You may want to think about any mods or work
> ~you've done recently to make sure you haven't knocked something loose,
> ~damaged a connection, etc.
>
> ~ Good luck!!
>
>
> -Jon-
>
> .---- Jon Steiger ----- jon@dakota-truck.net or jon@twistedbits.net
> ------.
> | Affiliations: AOPA, DoD, EAA, NMA, NRA, SPA, USUA; Rec & UL Pilot -
SEL
> |
> | '92 Ram 150 4x4 V8, '96 Dakota V8, '96 Intruder 1400, '96 FireFly 447
> |
> `------------------------------ http://www.cs.fredonia.edu/~stei0302/
> ----'
>
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