TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

What the hell is going in? I have a fuel issue....

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Old Oct 4, 2010 | 02:30 PM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
What the hell is going in? I have a fuel issue....

It's spraying fuel, pulled plug and has spark, when pulled it started but when in it didn't. Just starter not turning over at all. WTF could it be?
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Old Oct 4, 2010 | 06:27 PM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

I changed the cap, rotor, ignition module and no change?
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Old Oct 4, 2010 | 08:48 PM
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From: Manteca,California. Nor Cal.
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: What the hell is going on? I have fuel and stark but no start?

Ok. so you have fuel and you have spark. you removed 1 spark plug and it started? Or is the starter not doing anything? Is it cranking and not firing. Or not cranking? If the plug is out and it starts it's almost like the exhaust is plugged so its backing up into the engine and with a plug out it gives the exhaust a place to go. But I need to know what it is doing for sure.
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Old Oct 4, 2010 | 09:41 PM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Originally Posted by UnderCover89TBI
Ok. so you have fuel and you have spark. you removed 1 spark plug and it started? Or is the starter not doing anything? Is it cranking and not firing. Or not cranking? If the plug is out and it starts it's almost like the exhaust is plugged so its backing up into the engine and with a plug out it gives the exhaust a place to go. But I need to know what it is doing for sure.
Correct with 1 plug out it started, put it back in and it didn't. It will turn over but not start.
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Old Oct 4, 2010 | 11:54 PM
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From: Manteca,California. Nor Cal.
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: What the hell is going on? I have fuel and stark but no start?

try unbolting the exhaust flanges and see if it starts then
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Old Oct 5, 2010 | 08:06 AM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Ok,I'm gonna try a few more sensors first and then try that.
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Old Oct 5, 2010 | 11:56 AM
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Re: What the hell is going on? I have fuel and stark but no start?

did you pull distributor?
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Old Oct 5, 2010 | 01:41 PM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Originally Posted by Ronny
did you pull distributor?
what do you mean? I changed the cap and rotor button and checked the igintion module but didn't change the acutal distributor.

could it be the fuel pressure regulator? maybe it's not getting enough or to little fuel?

How do you remove it on a TBI car? I am new to TBI. please go into detail. the fuel filter might be clogged from the bad starts lately but it did start with the plug out so I doubt it's that.

any other ideas?
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Old Oct 5, 2010 | 02:46 PM
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Re: What the hell is going on? I have fuel and stark but no start?

Just checking. That was explain for your issue if out of time.

Hit it with starting fluid and see if it fires. Ias the spray from injs real good?
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Old Oct 5, 2010 | 02:51 PM
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Poured fuel in the throttle body and it started and ran. It's a fuel issue.



How do you replace the fuel filter?
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Old Oct 5, 2010 | 02:56 PM
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From: Winchester, VA
Car: 1991 Camaro RS/1989 Vert RS
Engine: 355/350
Transmission: T-5/T-5
Axle/Gears: BW9bolt3.45posi/3.23 Posi
Re: What the hell is going on? I have fuel and stark but no start?

drivers side, in front of the rear wheel. Takes 2 mins to replace with the right tools.
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Old Oct 5, 2010 | 02:58 PM
  #12  
david068513's Avatar
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Originally Posted by JTNKTZ
drivers side, in front of the rear wheel. Takes 2 mins to replace with the right tools.
Alittle more info? What tools? I've never done this before. It's either that or the fuel pressure regulator.



How do you do it?
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Old Oct 5, 2010 | 03:26 PM
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Re: What the hell is going on? I have fuel and stark but no start?

Highly recommended is a haynes shop manual. check EBay or local auto store. other issues will spring up and you will have it handy.
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Old Oct 5, 2010 | 03:42 PM
  #14  
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From: binghamton,ny
Car: 1988 camaro sc
Engine: nasty 305 tbi,tba 632 big block
Transmission: built 700r4
Axle/Gears: 3.23
Re: What the hell is going on? I have fuel and stark but no start?

Fuel Filter Location
Fuel Filter Location

Caution: To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing fuel system components. See Fuel System Release .

Inline Filters can be found in the fuel feed line on the rear crossmember of the vehicle.


gotta love alldata! lol

Last edited by 1fastcamaro88; Oct 6, 2010 at 12:23 PM.
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Old Oct 5, 2010 | 05:49 PM
  #15  
david068513's Avatar
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Changed it... Bad idea in a driveway. I got gas everwhere. It sucks. I'm covered. Drenched my head and shoulders.

It runs now. But very rough. I'm gonna check to make sure I got the plug wires back on right and go from there.
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Old Oct 5, 2010 | 10:49 PM
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UnderCover89TBI's Avatar
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From: Manteca,California. Nor Cal.
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: What the hell is going on? I have fuel and stark but no start?

well that shouldnt make it fire when a plug is out and not when a plug is in there. Knew it was going to be a fuel problem!
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Old Oct 6, 2010 | 12:29 PM
  #17  
david068513's Avatar
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From: Ganiesville GA
Car: 1992 z28/1992 RS heritage edition
Engine: 350 tpi, 305 tbi
Transmission: 700R4,T5
Axle/Gears: G92
Re: What the hell is going on? I have fuel and stark but no start?

Ok it will start and run now and sputter and die. It was starting and running and idling for 5-10 min. Then it would die right after you start it. Act like it's running out if gas and die.
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