Gain extra benefits by becoming a Supporting Member Click here find out how!
Silver
Gold ***Platinum***
deek01BigDogSS (6)jk56chevy (11)WarrenL (2)Jens (10)
edad2000Custom_Deluxe_20VetteGyrl (2)JohnB (2)
speedygman (7)rickityfiftyMafo971Clifford Lao502drfleetline
Jud Leowish Non-synchronizedWGS53MobyVandurahereford
gary635g (6)
johnhem (10)
Greyimpala (5)
emil
axmaker (3)
socalarch (3)
usmile4 (8)
Classic Performance Products Classic Parts
Ciadella Interiors American Auto Wire Art Morrison.com
Exile® Battery Keeper™ 6/12 volt charger w/ LED battery monitor
Low priced Genuine GM Auto PartsEcklers AutoMotive
Hellwig Products IncPerformance Rod & Custom
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy

Recent Hot Topics
Current Quote
"I just want to say thanks to all of the contributors on this forum. There is a wealth of knowledge here and a super willingness to share. I can't get better and faster answers here than on ANY other board and I do frequent a lot of forums. THANKS AGAIN!!"
~ Member
Recent Topics
LMC Truck Join the Community today Join Us Now  



 
Username Post: 1989 chevy tbi timing        (Topic#224600)
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-26-09 12:11 PM - Post#1760876    

i have a 89 chevy i just put new distributer what do i time it at
lifted chevy


Edited by lifted 89 tbi on 08-26-09 12:18 PM. Reason for edit: No reason given.

 
Low priced Genuine GM Auto Parts
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-26-09 12:15 PM - Post#1760878    
    In response to lifted 89 tbi

and i already unpluged the wire that goes to the computer
lifted chevy


 
Chevytech 
Subject Matter Expert - Senior Member
Posts: 3014

Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
08-26-09 02:41 PM - Post#1760954    
    In response to lifted 89 tbi

What are you working on?

What vehicle? What model?

Which engine?

Do you have a timing light?
For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If the it has been altered from stock let us know about that too.


 
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-28-09 02:28 AM - Post#1761798    
    In response to Chevytech

its a 1989 chevy k1500 350 tbi
I am having trouble getting it to run right i put new.
2 injectors and fuel filter
new distributer
msd street fire coil
cap router
plugs wires

I set the timing at -4 and it seems to run the best but if i plug the EGR in it will idle fine butt as soon as i give it gas it run realy ruff and when i unplug the EGR it seems to have a slite miss or a pop out the tail pipes
lifted chevy


 
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-28-09 02:55 AM - Post#1761801    
    In response to lifted 89 tbi

the reason i put the timing at -4 digrees and not 0 degrees is at -4degrees when i give it a littel bit of gas it shouts right to 0 digrees and i am doing this with the electronic timing wire unpluged.
lifted chevy


 
Chevytech 
Subject Matter Expert - Senior Member
Posts: 3014

Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
08-28-09 07:00 AM - Post#1761895    
    In response to lifted 89 tbi

The timing should be set to zero degrees at idle. It should not have to be set at 4 degrees after TDC.

It is normal for the timing to advance when you open the throttle.

  • Quote:
I set the timing at -4 and it seems to run the best but if i plug the EGR in it will idle fine butt as soon as i give it gas it run realy ruff and when i unplug the EGR it seems to have a slite miss or a pop out the tail pipes



Your statements are not real clear to me.

The EGR valve should never open at idle. The EGR solenoid should not supply ANY vacuum to the EGR valve at idle. Test it to see if it does.

It sounds like the vehicle could have an EGR problem.

There are multiple types of EGR valves and to help you test it I need to know which kind of EGR it has.

TBI trucks are generally Negative pressure EGR or Port EGR systems, except California emission 4.3 TBI trucks had Linear EGR valves.

This is a site that has a photo and an illustration about EGR vale numbers which should help you determine which type of valve your vehicle has.

http://shbox.com/1/EGR_ID.jpg


A pop or miss in the exhaust could be caused by mutual induction. Plug wire routing can cause this. The plug wire for cylinder five and cylinder seven, on a Chevrolet, should not be routed right next to each other in a parallel manor. One of the other plug wires should be placed between them, and wires for 5 &7 should cross over each other, one time, approximately half way down the wire.

When you start this truck, will it start and idle without you pushing on the gas pedal at all?
For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If the it has been altered from stock let us know about that too.


 
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-29-09 10:48 AM - Post#1762577    
    In response to Chevytech

I set the timing to zero.re routed my plug wires to how you sed to.The EGR assembly plant code,DCP,the part idenifcation number, 17087194,Day of year,1,Buid date code,5-1-0,Shift ID,1,Type of valve,N=negative presure,Im going to replace it.



Could it be a burned valve, or a stuck valve seams like it is smoking out the paqssnger side its dark black smoke.Only when half throttle?[color]
lifted chevy


 
Chevytech 
Subject Matter Expert - Senior Member
Posts: 3014

Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
08-29-09 11:21 AM - Post#1762597    
    In response to lifted 89 tbi

  • Quote:
Could it be a burned valve, or a stuck valve seams like it is smoking out the paqssnger side its dark black smoke.Only when half throttle?


Anytime a TBI engine looks like it could be running rich, test the coolant temp sensor because it is one of the criteria used by the ECM to determine how much fuel to inject.
There are specs and instructions in the sticky FAQ area near the top of this message board. If you can’t find them let me know and I will post them again.

Also look at the injectors when it is running and see if the have a nice spray pattern and see if both injectors look to be spraying the same amount of fuel.



  • Quote:
The EGR assembly plant code,DCP,the part idenifcation number, 17087194,Day of year,1,Buid date code,5-1-0,Shift ID,1,Type of valve,N=negative presure,Im going to replace it.



Great
It is a negative back pressure EGR valve.

Negative backpressure valves should hold vacuum with the engine off. When the engine is started the valve should bleed vacuum. The slightest pulse of pressure in the exhaust system will modulate recirculation (close the valve at least some). A good test for these is to put a hand vacuum pump on the EGR valve and apply vacuum with the engine off and it should hold vacuum. Leaving the vacuum on it, start the engine, and the valve should close.

Have you checked the ECM for trouble codes?
For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If the it has been altered from stock let us know about that too.


Edited by Chevytech on 08-29-09 11:35 AM. Reason for edit: Add more

 
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
08-31-09 02:46 AM - Post#1763600    
    In response to Chevytech

i put a new intake mainifold on it as well as a new,EGR, it is running better now then when i bought it but. i ajusted the vauls there close butt not right any installation tips or how do i ajust them so they are perfect pleas help.
lifted chevy


 
Smokey 
Senior Site Adminstrator
Posts: 17447
Smokey
Age: 65
Loc: "Small town USA"
Reg: 12-06-99
09-01-09 02:28 PM - Post#1764574    
    In response to lifted 89 tbi

This thread has been moved to the truck's forum (88-98)
'67 427 Chevy C-10
'79 454 surburban
'89 454 1 ton dually
'03 V-Star 1100


In Memory of CT's Mike McVeigh and Ron Schrapp (aka rons56)


 
355Cheyenne 
Senior Member
Posts: 3765
355Cheyenne
Loc: Northern MN
Reg: 10-27-04
09-01-09 09:07 PM - Post#1764804    
    In response to Smokey

there are two definitive ways to set valve lash. with the motor running and with the motor not running. With the motor running, it works best to do one side at a time so it doesn't make to much a mess. I would recommend oil deflector clips as well. any part house should have them.

just loosen the cap nut until it starts to tick, then tighten until it stops ticking and add a 1/4 turn more.

with a motor not running you set to TDC and there is a set of cylinders you can adjust and then you turn in over another stroke and to another set. I forget the sequence right now but you loosen the rocker nut and then while spinning the push rod tighten until it just ketches, then add 1/4 turn. I do 1/2 turn on new motors.
98 Silverado k1500 4x4 350


 
lifted 89 tbi 
Forum Newbie
Posts: 15

Loc: dulth
Reg: 08-26-09
09-02-09 07:05 PM - Post#1765341    
    In response to 355Cheyenne

K thank i just did it i just got a smokin problem out of the right side of the motor.Do you no what i could do or is there somthing, i could put in my motor.
lifted chevy


 
Low priced Genuine GM Auto Parts
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

9382 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.13 seconds.   Total Queries: 15   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 09:38 PM
Top