> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of
> david.clement@verizon.net
> Sent: Wednesday, January 07, 2004 1:40 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: Re: DML: Throttle body..
>
> The bog, hesitation and/or stumble is a carb characteristic. This does not
> happen with a port injected engine with a dry TB. When a carb is
> too big you
> loose too much air velocity as you open the throttle if it's too
> big resulting
> in a loss of vacuum that is needed to pull fuel from the bowls.
> This is a non
> issue with port injection. If you were so inclined you could take
> the TB off
> the engine and use your hand to control rpm.
>
> Dave Clement
> 99 SLT+ CC 4x4
The phenom does happen in port injection as well. The PCM has an
acceleration enrichment routine or AE(equivalent of accelerator pump on the
carb) which helps with the quick throttle transitions. If you open up the
intake path enough, the factory settings for AE will not be sufficient for
the added air and you'll end up with an off idle stumble or a lean pop back
through the TB in severe cases.
M1 intake installs see this trait quite often.
Bob
This archive was generated by hypermail 2b29 : Sun Feb 01 2004 - 16:29:49 EST