Hope you find the fix soon, can't have you losing races to mustangs!
Engine chokes when I accelerates?!?!?!?!
Thread Starter
4th Gear
Joined: Oct 2012
Posts: 4
Likes: 0
From: Forest Hill US: MD
Engine chokes when I accelerates?!?!?!?!
Hey fellows, I have a 1993 with a LT1 and the engine chokes when I accelerate. It does not matter if the engine is cold, hot, running, just started up. It doesn't matter if I accelerate from a stop light, or just driving on the road. I have put different gas in it. All 91-93 and have been to different gas stations. It only chokes when I step on the gas. It normally chokes when it get close to 3000 + rpm. This sucks when I try to race people(normally mustangs). Any ideas. I have not tried anything. The guy I got it from put new injectors in, also I have put in an octane booster and it seemed to do it less. It will choke some times and then be fine.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
Have you gone thru the engine controls and set everything to spec?
fuel pressure
timing/advance
TPS
EGR
exhaust/CATS
fuel/air filters?
any or all of these things can cause it to not want to rev. Since its a LT you have one fairly expensive possibility in the Opti...so I'd check everything else first. Your FSM will describe what to do and how.
fuel pressure
timing/advance
TPS
EGR
exhaust/CATS
fuel/air filters?
any or all of these things can cause it to not want to rev. Since its a LT you have one fairly expensive possibility in the Opti...so I'd check everything else first. Your FSM will describe what to do and how.
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
Sorry - that is one of the classic Opti symptoms.
Try everything else first, but be prepared for an opti & waterpump change.
Find someone near you with a 92 or 93 Factory service manual and follow all the troubleshooting steps first.
Try everything else first, but be prepared for an opti & waterpump change.
Find someone near you with a 92 or 93 Factory service manual and follow all the troubleshooting steps first.
Le Mans Master
Joined: Dec 2006
Posts: 5,139
Likes: 482
From: H-Town Texas
Check you fuel pressure regulator, a.k.a. FPR. It is located at the back of the fuel rail on the intake manifold. There is a thin vacuum line hooked up to it. Pull that line and see if there is any gas there. If there is, it needs to be replaced.
Unless you know for sure when last replaced, it may also need the basics, plugs and wires.
There could also be a vacuum leak.
Unless you know for sure when last replaced, it may also need the basics, plugs and wires.
There could also be a vacuum leak.
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