can Not start, please help

[jim ross]

Originally Posted by Normy

Have you checked the ignition timing on this car?

N

perhaps a semi clogged fuel filter as well? or fuel pump check valve??...check both and timing......

[tr928]

the fuel filter is brand new and the fuel pump is good as well...how would i check the ignition timing on the car?

Thanks

[JhwShark]

You will use a timing light to check ignition timing. Sounds like a new procedure for you so you...
The Timing light has two power leads; the positive to hot post and negative to good ground connection (I have used the strut cross member bolts). There is also another lead that connects on the #1 plug either inductive (lead will clip over the plug wire) or in series (older style).

Connect the leads properly, plug the vacuum hose that goes to throttle body from distributer then turn turn car on. shoot the light at the crank pulley from above and behind the radiator being careful not to get hit by the fan; get the light as close as possible. If the light illuminates and you see marks on the pulley you are close to determining accurate timing. If you loosen the distributor hold down bolt (loosen so you can snugly move the distributor in both directions, do not remove) you should be able to see the crank pulley marks move as you shoot the light while rotating the distributor; rotate the distributor so the specified marks on pulley line up to the crankcase pointer/mark(it should be obvious).

You should be able to hear subtle engine changes

Jon

[DPW928]

If you haven't adjusted the timing or timing belt setting, the ignition timing should be OK. You have adjusted the A/F mixture which cannot be set by ear. It may sound great at idle but be too lean or rich to accelerate. There are a couple ways to adjust the A/F mixture without an exhaust gas sensor which can be used to get the mixture close to stroimetric. Recommend you try one of them before adjusting anything else.

[JhwShark]

Originally Posted by DPW928

There are a couple ways to adjust the A/F mixture without an exhaust gas sensor which can be used to get the mixture close to stroimetric. Recommend you try one of them before adjusting anything else.

Cool, I'm interested in the couple of ways...please post. I have a tailpipe gas analyzer for CO but it is analog and not verry accurate.

Thanks,
Jon

[DPW928]

Originally Posted by JhwShark

Cool, I'm interested in the couple of ways...please post. I have a tailpipe gas analyzer for CO but it is analog and not verry accurate.

Thanks,
Jon

Method one requires you to jump the 30 and 87 connections on the fuel pump connection (engine not running). This will run the pump continuously. Use the 3 mm allen tool to move the A/F adjustment from lean to rich until you can hear fuel going to the injectors. Back off (lean) the adjustment until the fuel stops then button it up.

Method 2 requires the engine to be running. Slowly turn the A/F to lean until the engine starts to misfire. Mark that spot in the rotation then slowly turn the adjustment to rich until it starts to misfire. Mark that spot then turn the adjuster back to the midpoint between the 2 marks.

After adjusting by either method, the idle (not A/F) adjustment may need to be made.

[JhwShark]

DPW928...
Great info!

Thanks,
Jon

[tr928]

ok thank you for the direction that was very informative, and thank you very much for those other two methods on how to adjust the A/F mixture. I will try the A/F mixture tips and see how that works out, since its original problem was that it ran too rich, and its possible i didnt correct it since i did go by sound and not gauges.

Thanks