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

Timing Help please,......

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Old Jul 20, 2011 | 09:47 PM
  #1  
killacamaro's Avatar
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From: NY
Car: 88 IROC-z
Engine: LO3 V8 305
Transmission: T5 W/ Stage 2 Clutch
Axle/Gears: 3.23
Timing Help please,......

Hey guys well I finally have time on me hands and some cash. Ready to put this Sexy on the road and Burn some Rubber.... So I forgot to mark my Dizzy when I took her out for replacement. So I have then read and was told it goes between plug #'s 1 and 3 So this is where I have her. Car starts up no problem or when I sit the dizzy in the location I believe she goes.

Now when I put the car in 1st gear, she loses all power etc..... Also I have no Timing tab, Is there a way to adjust the timing still? And how would I achieve this? Thanks guys.
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Old Jul 21, 2011 | 08:33 AM
  #2  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Timing Help please,......

What position were the crank and cam in when you installed the new distributor?
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Old Jul 21, 2011 | 08:39 AM
  #3  
killacamaro's Avatar
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From: NY
Car: 88 IROC-z
Engine: LO3 V8 305
Transmission: T5 W/ Stage 2 Clutch
Axle/Gears: 3.23
Re: Timing Help please,......

Originally Posted by Apeiron
What position were the crank and cam in when you installed the new distributor?
That I couldnt tell you this was about 2 years ago, when I dropped the new dizzy in I was told to put it at BTDC and then position the dizzy at the location I said.

I couldnt tell you the others.
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Old Jul 21, 2011 | 07:39 PM
  #4  
camaronewbie's Avatar
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Timing Help please,......

1) Pull #1 spark plug
2) stick finger in the hole
3) rotate engine by hand (need a helper) until you feel the air pressure on your finger.
4) use a straw, stick it in the spark plug hole, turn the engine one direction then the other, just slightly, until you get the straw at the highest point out of the hole (the straw rides on top of the piston - when the piston is at it's highest point, the straw will stick out the farthest).

NOW you are at TDC #1 cylinder on the compression stroke.

5) remove distributor cap - where ever the rotor points, that HAS to be the corresponding number one spark plug wire on the cap.
6) route remaining plug wires in firing order
7) replace #1 spark plug

NOW you are set at a timing of ZERO (factory specs for a TBI). You can adjust to a slightly higher timing of like 4 degrees advanced, but without a timing tab, you'll need a dial-back timing light to know exactly where that is.
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Old Jul 21, 2011 | 07:46 PM
  #5  
killacamaro's Avatar
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From: NY
Car: 88 IROC-z
Engine: LO3 V8 305
Transmission: T5 W/ Stage 2 Clutch
Axle/Gears: 3.23
Re: Timing Help please,......

Originally Posted by camaronewbie
1) Pull #1 spark plug
2) stick finger in the hole
3) rotate engine by hand (need a helper) until you feel the air pressure on your finger.
4) use a straw, stick it in the spark plug hole, turn the engine one direction then the other, just slightly, until you get the straw at the highest point out of the hole (the straw rides on top of the piston - when the piston is at it's highest point, the straw will stick out the farthest).

NOW you are at TDC #1 cylinder on the compression stroke.

5) remove distributor cap - where ever the rotor points, that HAS to be the corresponding number one spark plug wire on the cap.
6) route remaining plug wires in firing order
7) replace #1 spark plug

NOW you are set at a timing of ZERO (factory specs for a TBI). You can adjust to a slightly higher timing of like 4 degrees advanced, but without a timing tab, you'll need a dial-back timing light to know exactly where that is.
I did this already sir, when I replaced the dizzy, I guess now I need a light to set the timing more correctly?
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Old Sep 18, 2011 | 09:25 AM
  #6  
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From: Robertsdale, AL 36567
Car: 1992 Pontiac Firebird
Engine: 5.0L TBI
Transmission: Automatic
Re: Timing Help please,......

I have the same problem going on. Only when I did mine, I based it off of Spark Plug 2 and the rotor was facing towards spark plug 1. I set the dizzy for spark plug 2 and routed like that for the correct firing order. Now it starts, but any touch of the gas and she bogs or dies. I know the timing is off. Now if Cylinder one is at TDC the rotor should be pointing at Cylinder 1 correct? If this is the case, I can just pull the rotor and set it so the mark on the rotor is facing Cylinder 1 and all should be fine right?
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