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305 TPI ISSUE HELP PLEASE!!!!

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Old Mar 11, 2015 | 05:42 PM
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Johnny313's Avatar
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305 TPI ISSUE HELP PLEASE!!!!

Hi, I need your help!! My car developed this issue over the winter. It ran fine when I stored it. Last year I replaced the injectors, MAF, plugs, wires, IAC, TPS, fuel filter. It ran perfect, idled perfect. After about a month of sitting in the cold, it didnt wanna start up. And when I got it going its giving me this problem, I cannot rev it full throttle, it chokes up. Anyone deal with this issue and how do I go about troubleshooting it. Any help will be appreciated. Its a 1988 305 TPI. There is NO check engine light on.

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Old Mar 11, 2015 | 10:53 PM
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Sounds like a lot of knock. For grins I'd look at the distributor to make sure it didn't move. It was only sitting for a month? Might want to check to make sure mice didn't move in to the exhaust or air intake.
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Old Mar 12, 2015 | 07:11 AM
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Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: 305 TPI ISSUE HELP PLEASE!!!!

It does sound like its starving for air bigtime.
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Old Mar 17, 2015 | 07:47 AM
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 305 TPI ISSUE HELP PLEASE!!!!

Originally Posted by Johnny313
Last year I replaced the injectors, MAF, plugs, wires, IAC, TPS, fuel filter. It ran perfect, idled perfect. After about a month of sitting in the cold, it didnt wanna start up. And when I got it going its giving me this problem...
What do you mean it didn't want to start up? Was it turning over freely when you were trying to start it and just not catching, or did it literally feel like it was binding with resistance? That knock sounds like it is coming from outside the engine, if the temperature was freezing, and the engine was fighting you to spin, I would check your flexplate for looseness or cracking...
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Old Mar 17, 2015 | 01:54 PM
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From: Wauconda, IL
Car: 69 Corvette
Engine: 409 CID SBC
Transmission: SS 700
Axle/Gears: 3.70
Re: 305 TPI ISSUE HELP PLEASE!!!!

Just looking at the video, it appears you have the MAF and intake hose disconnected from the throttle body and just sticking out the front of the engine compartment?
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Old Mar 24, 2015 | 10:00 AM
  #6  
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From: Upstate NY
Car: 1987 Camaro Z28 IROC-Z
Engine: LB9
Transmission: 700r4
Re: 305 TPI ISSUE HELP PLEASE!!!!

Id check your fuel pressure and also keep in mind the fuel pump may be a problem as well. similar things were happening to my fathers truck and he replaced the pump and now its running a lot better.
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Old Mar 26, 2015 | 06:23 PM
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Re: 305 TPI ISSUE HELP PLEASE!!!!

Thanks everyone for your advice so far. The cap and rotor were very carbon fouled and corroded...cant believe it was that bad in the course of a year, weve had a cold and brutal winter. I also replaced the plugs again, and the car fired up fine. Im still getting issues with cold starts, which is leading me to think the CSI is also a problem as well as the fuel pump.. only reading 35psi when the car is cold but gets a normal reading after. I drove the car and filled it up but its still hesitating when accelerating. I am going to swap the pump and filter and go from there. Again thanks, for the help so far...
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