timming issue merc 260/5.7

[mlambert]

having trouble with timming. time stays advanced cannot get below 10-12 degrees should be at 8 what is going on?what should i do
thanks

 

[Bondo]

Re: timming issue merc 260/5.7

We gotta know What you've got for Power,......

Merc. has used the 350 Chevy for 30 years, with different Ignition systems.......
Is this Points,..??....
T-Bolt IV,..??...
T-Bolt V,..??....

Got a Year or Serial #,..??....

 

[mlambert]

Re: timming issue merc 260/5.7

We gotta know What you've got for Power,......

Merc. has used the 350 Chevy for 30 years, with different Ignition systems.......
Is this Points,..??....
T-Bolt IV,..??...
T-Bolt V,..??....

Got a Year or Serial #,..??....

 

[mlambert]

Re: timming issue merc 260/5.7

t-bolt V
1990

 

[Bondo]

Re: timming issue merc 260/5.7

Are you setting the T-Bolt V into Base Timing Mode with the Jump Wire,......

If Not,.... The Spark Controller is Faster than You are at changing the Timing.......

 

[mlambert]

Re: timming issue merc 260/5.7

can you explain the proceduere what is the jump wire

 

[Don S]

Re: timming issue merc 260/5.7

Are you sure you have a Thunderbolt V, the 1990 model only had a TBolt IV system.

 

[Don S]

Re: timming issue merc 260/5.7

In case someone upgraded the engine or ignition system somewhere along the way. Here is the procedure used ONLY on the TBolt V, it's not used on the TB IV system.

 

[mlambert]

Re: timming issue merc 260/5.7

sorryy guys i checked last night i have t-bolt IV is it the same procedure as the V
thanks

 

[Bondo]

Re: timming issue merc 260/5.7

Nope,.......

The T-Bolt IV Doesn't have a Base Timing Mode,.....

Just throw the Light on it,+ Set the Timing.........

Make SURE that you have the Idle set right,..... That'll Screw it All Up......

 

[Don S]

Re: timming issue merc 260/5.7

In case someone upgraded the engine or ignition system somewhere along the way. Here is the procedure used ONLY on the TBolt V, it's not used on the TB IV system.

 

[Reel Poor]

Re: timming issue merc 260/5.7

cannot get below 10-12 degrees

Can you explain whats happening, ie, distributer won't rotate, engine dies, or other?

 

[mlambert]

Re: timming issue merc 260/5.7

timming will not get below 10-12 degrees. it will ping if i run up above 3200 rpm i dont really ever push it that hard but i know something is not right and that bothers me and the engine.

 

[Haut Medoc]

Re: timming issue merc 260/5.7

I think what Reel Poor is asking is when it will not go below the 10-12 degrees, it is because the distributer will not turn any further?
So I have to ask: Are you on the correct wire? #1?
& are you sure you have the correct position of the ign. wires?.........JK