Are the 5th and 6th gen accord v6 timing adjustable by turning the distrubutor?

 

Hmm iono bout that one....usually if you want to retard or advance the timing of the camshaft you adjust the camshaft a little....what do u mean by "turning the distributor"??

 

turning the dizzy=advance and retarding on sohc engine

it cant be done with a ecu controlled ignition system

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2+2=5 &raquo;</TD></TR><TR><TD CLASS="quote">

it cant be done with a ecu controlled ignition system</TD></TR></TABLE>
I think your wrong there. Most Hondas have had the ignition timing controled by the ECU since about 1990. I know at least some of them are ajustable.

 

No, 2+2 got it right, for the most part. 96+ (OBD 2) Accords can't have the timing retarded or advanced. The timing, like 2+2 said, is controlled by the ECU. The only way you would be able to adjust timing is by using an adjustable cam gear. But even then, the gear is really for fine tuning timing adjustment. Turning the distibutor changes the time at when the spark ignites in relationship to when the piston hits TDC. Using the cam gears changes the distance at which the valves are open during combustion.

 

Please notice that there is two types of timing. One is ignition timing (When the spark plugs fire in relation to the piston). The other is Cam timing (When the valves open and close in relation to the piston). I know to advance or retard ignition timing, on Honda’s that run true distributor, you can loosen the distributor and rotate the top of it toward the fire wall to adv. or rotate it towards bumper to retard.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by david90 &raquo;</TD></TR><TR><TD CLASS="quote">Are the 5th and 6th gen accord v6 timing adjustable by turning the distrubutor?</TD></TR></TABLE>

OBD-1 distributors are adjustable.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Escobar &raquo;</TD></TR><TR><TD CLASS="quote">

OBD-1 distributors are adjustable. </TD></TR></TABLE>
Yes they are. They are also ecu controlled ignition systems right?

 

The ecu senses what is going on but doesn't do anything about it unless you are throwing codes, usually....that's how i understand it anyways...

 

according to the manuals you have to jumper and put the car into diagnostic mode for the timing to be adjsuted without the diagnostic mode it will readjust the timing back to normal at the ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Steve00GSR &raquo;</TD></TR><TR><TD CLASS="quote">No, 2+2 got it right, for the most part. 96+ (OBD 2) Accords can't have the timing retarded or advanced. The timing, like 2+2 said, is controlled by the ECU. The only way you would be able to adjust timing is by using an adjustable cam gear. But even then, the gear is really for fine tuning timing adjustment. Turning the distibutor changes the time at when the spark ignites in relationship to when the piston hits TDC. Using the cam gears changes the distance at which the valves are open during combustion.

The question was "is timing adjustable on 5th and 6th gen V6 accords" not talking about cam to crack timing. Anyways, since the early 90's all honda's and Acura's ignition timing is control/monitored by PCM. As the engine speeds up(RPM) the PCM advances the ignition timing. But the on earlier PGM FI's, ignition advance was not mech. by using a vaccuum advance and wieghts at open throttle. This systems can be find in 86-89 integ. legends and carb systems and some off the PGM-FI models like the 86-89 acccords.
</TD></TR></TABLE>

 

Can you adjust one and not the other
How do I adjust it just turn the cam

 

Yes and no.
All PGMFi cars timing is controlled by the ECU. On distributorless systems timing is in complete control of the PCM and its not adjustable without a reprogram of the PCM

TO set the timing on fuel injected Hondas with an actual distributor, there's a jumper harness usually under the dash depending on the model on the driver side or passenger side but usually the passenger side that you stick a jumper wire in and this tells the computer that you're adjusting the timing. You set the timing to the specified advance as a base and then the computer will control the timing up or down depending on engine load etc etc. On early fuel injected Accords however in the 90s there is also another adjustment on the ECU. If you download a service manual you'll see what I'm talking about but I'll post a picture here below. On carbureted Honda's the timing is set conventionally, like any other carburetor engine.

 

If your reference is to cam timing, again that's a yes and no.
Hondas are interference fit engines so changing cam timing has some serious limitations. Again, the ECM/PCM , will need to be reprogrammed to accept any chages outside of the OEM (emmission controlled) settings.

 

To make cam adjustments you need an adjustable cam(s) sprocket(s). Make sure you don't go to far or you risk a valve to piston collision.

Always double check.

The proper way to do this is to be able to remove the head so that once you set your cam timing you can place some Silly Putty or similar on top of the piston and double-check that your valves are in good clearance of the Piston crowns by turning the engine over by hand and then removing the cylinder head and checking the indents in your silly putty..

"measure twice cut once"

 

This is an old thread that has been thread jacked from the OP's original question regarding 5th and 6th gen accord v6 timing adjustable by turning the distributor.

The answer is no for a V6.

/Old Thread closed.