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

Help....

Old Feb 19, 2004 | 11:01 AM
  #1  
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From: yey AREA
Car: 92 RS
Engine: 5.0 L03
Transmission: 700R4
Help....

Everytime i'm gonna start my car it always takes about 5-10 secs. to start... could it be fuel pump or relay. I already put a relaly in but it worked only for like 2 days and then it went back to the same thing... pls don't tell me i need a new fuel pump... thas a bisssch to change.
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Old Feb 19, 2004 | 11:06 AM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
It could be your oil sending unit. In a nut shell if it does not see oil pressure right away it will delay the fuel from starting the car. After a few seconds of cranking you build a little pressure and it will fire.

Last edited by ShiftyCapone; Feb 19, 2004 at 11:10 AM.
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Old Feb 19, 2004 | 11:09 AM
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From: yey AREA
Car: 92 RS
Engine: 5.0 L03
Transmission: 700R4
thanx... i'll give that a try.
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Old Feb 19, 2004 | 12:40 PM
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From: institute, wv
Car: 91 RS
Engine: LO3
Transmission: T-5
same as shifty said....mine is the exact same, when its cold...about 4 secs of cranking. when its warmed up...it takes about 1-2 secs...
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Old Feb 19, 2004 | 03:06 PM
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Car: '89 Formula
Engine: 305 TBI
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Sorry...can't help but chuckle.....


...any of you guys ever drive a carbed car?

Put those seconds into minutes, and you'd have it about right.....IF you can keep it running after it starts!
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Old Feb 19, 2004 | 04:42 PM
  #6  
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From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Originally posted by Fairly Strange
...any of you guys ever drive a carbed car?

Put those seconds into minutes, and you'd have it about right.....IF you can keep it running after it starts!
ehhh... I dunno about that.. there's times this '88 calibration kills me.. when the engine reaches about 20F, if you try to start her, she just won't fire. Ether's the only way I've gotten home some nights.. and even then, she was reluctant.
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Old Feb 19, 2004 | 05:12 PM
  #7  
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by Fairly Strange
Sorry...can't help but chuckle.....


...any of you guys ever drive a carbed car?

Put those seconds into minutes, and you'd have it about right.....IF you can keep it running after it starts!
Yes I have but any EFI car should start in a second after the pump has primed. If it doesn't something could be wrong or going bad.
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Old Feb 24, 2004 | 11:43 AM
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From: yey AREA
Car: 92 RS
Engine: 5.0 L03
Transmission: 700R4
hey capone... changed it, went and bought a new one and still have the same prob... any other suggestions. My dad is a mechanic (for about 35yrs.) and he is tellin me is the module... there is a camaro place in san jose called "POOR SALVAGE" is all camaros every year made... and i'm considerin takin a trip up there and gettin a new module unless someone can help me figure out the problem. thanx for any suggestions...

PS: for all u carb guys DAMN... wouldn't wanna be ya', my prayers go out for y'all.
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Old Feb 24, 2004 | 11:52 AM
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by chingon88cam
hey capone... changed it, went and bought a new one and still have the same prob... any other suggestions. My dad is a mechanic (for about 35yrs.) and he is tellin me is the module... there is a camaro place in san jose called "POOR SALVAGE" is all camaros every year made... and i'm considerin takin a trip up there and gettin a new module unless someone can help me figure out the problem. thanx for any suggestions...

PS: for all u carb guys DAMN... wouldn't wanna be ya', my prayers go out for y'all.
By changed it you mean the sending unit right? It could be a failing ignition module. I have never had one go out on me so I can't quite say thats what the problem is. My car currently behaves the same way. I am attributing it to a poor tune and a exhuast leak.
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Old Feb 24, 2004 | 11:58 AM
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From: yey AREA
Car: 92 RS
Engine: 5.0 L03
Transmission: 700R4
yeah, the sending unit... i've already done all the little things that need to be done... but still the thing won't start, the best i've ever done was that fuel relay, started up quick even in the morning when it was freezin cold...i even called a local dealership to ask about the computer prom and they no longer make the prom for my car... so i'm a little stuck, but not given up yet, i just don't wanna spend more cash for another starter.
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Old Feb 24, 2004 | 12:06 PM
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by chingon88cam
yeah, the sending unit... i've already done all the little things that need to be done... but still the thing won't start, the best i've ever done was that fuel relay, started up quick even in the morning when it was freezin cold...i even called a local dealership to ask about the computer prom and they no longer make the prom for my car... so i'm a little stuck, but not given up yet, i just don't wanna spend more cash for another starter.
It won't be the starter unless the car is not turning over. Do you let the pump prime for a few seconds before you crank it. By prime I mean turn the key to the on posistion and you can hear the pump kick on for a few seconds. This puts a bit of fuel right at the intake so that it does not crank dry right away. Also, have you chekced your ingition in general. What is the condition of your plugs, cap, coil, and rotor?
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Old Feb 24, 2004 | 12:13 PM
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chingon88cam's Avatar
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From: yey AREA
Car: 92 RS
Engine: 5.0 L03
Transmission: 700R4
like i said i've replaced everything... coil, cap, rotor, plugs, wires etc... the starter went out on me about 3 months ago, i'm assuming cuz i sit there crankin it for 5-10secs everytime i'm gonna start the car and i have a feelin is gonna go out on me again. i know the starter is not the problem nor has anything to do with the ignition in general... so i'm leanin towards the module or a fuel pump. but i'll try to prime the pump next time i go and start it... thanx again.
PS: now i got an primary exhaust leak, is gettin loud too... good thing is the drivers side, i guess i'll be spendin this weekend dealin wit this... oh well
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