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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 06-20-2009, 08:29 PM   #1
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Join Date: Aug 2005
Location: Charleston,SC
Posts: 53
Car: 1988 Pontiac GTA
Engine: 305 TPI
Transmission: 4 spd automatic

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Hard Start in Hot Weather After Sitting

Ok I have 2 problems:

1. The days in Charleston are now nice and hot. When the car sits at work for 8-9 hours and I go to start the car it turns over fine but acts like it isn't getting fuel. What I have noticed is that if I turn the ignition on and off 3-4 times (leaving it "on" a few seconds before turning off) it will start right up. It also starts just fine in the morning. Ideas?


2. My car is also slightly hesitating during medium acceleration. If I am going about 35-40 and accelerate to 55-60 I can feel a slight hesitation as I accelerate (almost like the car has a pulsation or tugging feel to it). I have also noticed that if I am running the A/C that after 5-10 minutes if I pull to a stop the car almost acts like it is going to cut off and if I go to accelerate it almost shuts off. Ideas?

Thanks,
Jeff
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Old 06-21-2009, 01:25 PM   #2
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Re: Hard Start in Hot Weather After Sitting

Hey, man. I'm in Columbia. I'm down in Charleston all the time. I work on an ambulance. Anyway, my idea would be the fuel pump. My 84 vette did the same thing. After I changed the pump I had no more problems.
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Old 06-28-2009, 02:03 AM   #3
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Location: Hville NC
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Car: 1991 Black Z28 and 1973 ford 2wd
Engine: 350 and 428 FE Big Block
Transmission: 5 speed manual and powerglide
Axle/Gears: 12 bolt rear and ford narrowed 9"

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Re: Hard Start in Hot Weather After Sitting

hendersonville NC here wwwwoooooo!!!!! check the fuel filter too. if its dirty enough it could cause that. and its a cheap fix.
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Old 06-29-2009, 11:15 PM   #4
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Car: 1987 Camaro IROC-Z
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Re: Hard Start in Hot Weather After Sitting

mine had the same problem, look at the fuel pressure regulator
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Old 06-29-2009, 11:27 PM   #5
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Car: 1986 camaro
Engine: 92 v8 5.7l
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Re: Hard Start in Hot Weather After Sitting

hey i just got a 1986 camaro with a 92 v8 5.7 liter engine in it . the car was running really crappy so i had to change firing order on the car it was running alot better.. but still wasnt right about a week later i discovred the smog silinoid was disconnected from the terminal where it goes into the top of the engine also the electric was not pluged into the conponent. i did some research and found out the correct way to hook it up .. i started and drove the car about 5 blocks car seamed to be running better then ever smooth and more power . after i turned the car off and tryed to start it up the next day .. car does not start .. as u hold the exnition and pump the gas the engine gets slowly to full running speed as if its running and when i let go of the exnition it turnes off as quick as i let go ?? i also tryed removing the smog silinoid back to how i org found it still same story any suggestions ?? thanks
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