Hi everybody,

My ignition timing on my 1987 740 turbo, B230FT, EZ 117K, is ~5 degrees after TDC. The Haynes and Bentley manuals say you can't adjust the ignition timing on EZ 115K and EZ 116K ignition systems. Can you do so for the EZ 117K? This is the overhead cam distributor with Hall sensor near firewall.

If I can't just rotate the distributor housing (which way should I go if I can?), what can I do to get appropriate timing, which is supposed to be 10 degrees before TDC.

Thanks.

 

You can try moving it but the computer adjusts the overall timing.
Also make sure the crank pulley didn't spin making it look like it is out of time.

 

Am I understanding this:
I know the computer controlls the timing, but if I were to slap on an Adjustable Cam gear, that the computer would overide it?

 

No you can adjust the belt but not the Dist. to change timing.

 

Ok! thanks for the clarification!

 

Lol np

 

Well, I searched some other sites and found out that you can manually adjust the EZ117K. So, I went out this afternoon and loosened the 2 bolts on the distributor and rotated the distributor CCW ~15 degrees. Then I checked timing with timing light and it's right on! 10 deg BTDC.

 

Thanks for the update. Alot of times it doesn't work you got lucky.

Does it run better now?

 

Runs better after 1 test drive. Hope it stays that way. 3 out of 4 of the spark plug wires were shot, as well. Couldn't get a resistance reading on those 3 on a 20 Mohm multimeter and couldn't get it to light up a timing light on those 3 wires. But the engine did start with those faulty wires and it seemed to run on 3 cylinders rather than one. Strange.

 

Be aware that this won't work on the later engines with the flywheel crank sensor.

Regards, Andrew.

 

So you are saying that without hall effect sensor and equipped with flywheel sensor turning distributer will not effect base timing . So When you do move distributer is that changing rotor position as well as cap position or are we missing something and turning distributer will not change rotor phasing with cap????????? Seems like it as nothing changes at crank. So I am 20 degrees ATDC and I have to reposition cam to change timing????

 

8 year old post.

lh2.2 cars (up to 1988, also 89 turbos), you set the timing via the distributor. LH2.4 cars (89 non-turbos and 90+ anything), its fixed by the computer and crank position sensor, there's no adjustments possible.

 

So the rotor just can be out of phase then when you move the cap around. so how do you guys phase the rotor correctly?????


put harmonics balancer timing marks to 15 degrees BTDC and pull cap and see if rotor is lined up with # 1 plug ??????

Or what is computer base timing set at.

 

Google doesn't care if post is 8 years old


Now post is current.

 

does computer use a cranking start ing. timing value and a different idle run timing figure. ??????

 

the amount of travel in the distributor isn't enough to matter, the rotor will still be close to #1 when its time to fire the spark for #1

The ICU calculated timing is dependent on the coolant temperature, so it changes as the motor warms up.

 

so the base timing is set for 15 degrees ??? upon start up at any temp. ?


To bad NOBODY is smart enough to develop a antifreeze sensor to warn people that the concentration level is below par. But that would cut more business now wouldn't it. But really create more.

 

my 2001 Volvo v70 won't start after timing belt replacement plus no RPM on cranking I need help.

 

wrong forum, wrong thread, wrong engine, etc... try the v70 forum here, https://volvoforums.com/forum/2001-2...l-year-v70-55/ and start a NEW thread, don't tag onto the back of an existing one.