305 TBI hesitation??
08-08-2010 | 07:58 AM
#1
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Joined: Jul 2010
Posts: 212
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From: Goodland, IN
Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73
305 TBI hesitation??
When picking up speed slowly the car kinda hesitates/surges a little. When I'm in overdrive running around 50-60 mph the car likes to hesitate/surges. But when I pick up speed harder it doesn't do it or when Im in overdrive if im running 65mph or above it will not do it. what could this issue be?Please help
P.S. its a 1992 firebird conv. 305 tbi automatic all stock
P.S. its a 1992 firebird conv. 305 tbi automatic all stock
08-08-2010 | 08:31 AM
#2
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Joined: Jun 2004
Posts: 184
Likes: 1
From: PA
Car: 94 9c1 Caprice
Engine: LT1 (3-fity)
Transmission: 4L60E reBUILT
Axle/Gears: 3:08 POSI (out)
Re: 305 TBI hesitation??
If it is at one speed range, I would check to TPS first (you can check with a meter).
There's how too's if you search.
There's how too's if you search.
08-15-2010 | 01:09 PM
#5
Senior Member
Joined: Oct 2009
Posts: 676
Likes: 1
From: Pacific NW
Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60
Re: 305 TBI hesitation??
Surging at cruise can, among many other things, be caused by EGR malfunction.
From your two threads it sounds like you are running lean under various conditions. Time to check the fuel pressure.
From your two threads it sounds like you are running lean under various conditions. Time to check the fuel pressure.
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