Setting Timing '99 4.3GL-PWTR

[Sunken Ship]

I made a shunt out of a plug I had from an old project, but I am doing something wrong. Steps that I took:
1. I hooked the shunt up to the distributor (not battery) while engine was off;
2. Connected timing light with clamp on no.1 plug wire (P-side front cylinder);
3. I started the engine;
4. With engine running I connected the shunt to the battery (didn't notice much of a difference in RPM change when power was connected); and
5 Attempted to adjust the distributor while the engine was running.

The timing mark on the crank pulley was right around the 3 o'clock position when the light flashes on the light while timing notch on the distributor cover is around the 1:30 position (approximately). I turned the distributor counter clockwise, but by the time I got the mark near the notch on the timing chain cover the engine would die and would not start since the engine was so far out of time. I did not even try rotating the distributor clockwise to try and get the timing correct. I figured by the time I got the mark from the 3 o'clock position on the crank pulley all the way around to 1:30 on the timing cover, it would be so far advanced it would never run right.

Any ideas what I am doing wrong? Maybe the shunt is not working? Engine runs great with the timing mark right around the 3 o'clock position. Just afraid of detonation if I am off. Appreciate any help/suggestions.

Thanks

 

[cobalt1999]

Page 5-8 of the "WT" Electrical / Ignition / Fuel Workshop Manual specifies that B+ is connected before starting.

 

[Sunken Ship]

Thanks for the input. I will certainly recheck procedure. Found a couple places stating my procedure. Certainly doesn't seem that trying your procedure would hurt anything.

 

[rs1lollie]

this was just addressed a couple of weeks ago. Manuel is wrong you connect to power after motor is running... there is a vid on this.
http://forums.iboats.com/forum/engi...-engines-outdrives/10263069-1997-4-3gl-timing

 

[Sunken Ship]

If the manual is wrong and I performed the procedure correctly then the ignition control module is bad...possibly?

 

[Sunken Ship]

Does the timing shunt cause....

Does the shunt cause.....

the timing to advance or retard?

 

[Bt Doctur]

it puts the engine in base timing , no advance

 

[Sunken Ship]

Would the shunt cause slight retard compared to when the shunt is not connected? Attaching seems to remove the timing advance provided by the ignition module. I hooked up the shunt and supplied power AFTER the engine was running. While engine was running I turned the distributor counter-clockwise, but could not get the timing mark to match the mark on the timing chain cover. Wondering if the ignition module is bad or the shunt is not making contact.

Engine runs great, but the timing mark on crank pulley is firing right around the 2:30-3 o'clock position

 

[Bt Doctur]

Not knowing your serial number, fuel system, year ,number of cylinders its hard to give the correct answer

 

[Scott Danforth]

with the timing shunt installed, the motor has no advance, so your on pure base timing. with it removed, the timing should be a bit more advanced (even at idle)

however what are you working on?

 

[achris]

You appear to have a 1999 Volvo-Penta 4.3 litre engine. I will move to the right forum.

It also appears to be more of a follow on to your previous thread, so I will merge them also.

 

[Sunken Ship]

Thanks guys...just wanted to confirm how the shunts are working exactly as I try to explain why I was unable to get mine timed properly. Obviously they are both the same.

 

[achris]

I would confirm that the TDC marks are in fact showing the correct position. Not unknown for a balancer hub to 'slip'. Probably the easiest way is to remove the spark plugs, and with a screwdriver or something similar in the hole turn the engine until #1 is at the top and look to see if the marks line up.

Chris......

 

[jeffnick]

While I was messing with the idle with the shunt in place the motor died. I inadvertently restarted the motor without removing the B+ wire -- it toasted the module...I had to buy another one. After the correct procedure with the timing set, I removed the shunt and lit up the mark with the timing light - it was all over the place, but the motor runs just fine.

 

[achris]

While I was messing with the idle with the shunt in place the motor died. I inadvertently restarted the motor without removing the B+ wire -- it toasted the module...I had to buy another one. After the correct procedure with the timing set, I removed the shunt and lit up the mark with the timing light - it was all over the place, but the motor runs just fine.

With the shunt removed, yes, the timing may be 'all over the place'. The important thing is to have the timing right with the shunt in. After that, the module controls the timing based on idle speed. If the module decides the idle is slow, it'll advance the timing untill it's right, and retard if it's too fast, so yes, you should see it dancing around.