View Single Post
  #7  
Old 09-17-2006, 09:51 AM
Uncle Acky Uncle Acky is offline
Registered User
 
Join Date: Jul 2003
Location: Richmond Hill
Posts: 149
Advice re: no start

Please do your self a favour and don't start replaceng parts without knowing they are bad. Check for spark ONLY at spark plug leads NOT at coil lead otherwise system damage could occur. make sure plug is properly grounded when checking for spark.

You must hear the fuel pumps (under car just forward of right rear wheel) operating for about 3 seconds when ignition turned on. Fuel pumps should also run while cranking, otherwise will not run unless engine is running.

Fuel pumps are controlled/powered by the MAS control unit which is behind the black plastic panel at rear of the battery.

The easiest way to check for power to the pumps on your car is to find the single pole (wire) connector in the front passenger footwell, on the right side at the top. Pull on the top front corner of the side panel to expose this wire and connector. Use a flash light...you may have to feel for it. You must have minimum 11.5 volts at this wire coming from the MAS unit WHILE CRANKING engine. If you don't find this connector remove the rear seat, there is a two pole (two wire) connector near the vacuum pump. One wire from this connector goes directly to the fuel pumps, you may test for 11.5 volts here ( while cranking).

If the fuel pumps do not operate and you have 0 volts in test above, you may remove the MAS control unit (carefull it's expensive) and disconnect the battery then bridge pins 1 and 2, reconnect battery and listen for the pumps working as you try starting. If the engine starts with the pins bridged, this indicates that the circuit in the MAS that controls the pumps EDIT: COULD BE bad. They are repairable. This problem may be noticeable after the car has not been used for several days and often will run well until about 10 minutes (temp related) of driving. Problem could be caused by related circuit feeds to the MAS control unit.

Hope this helps.
Acky

Last edited by Uncle Acky; 10-24-2007 at 10:22 AM.
Reply With Quote