Allpar Forums banner
1 - 5 of 5 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter · #1 ·
Hello. I have a 1989 TC Maserati
Engine will start then shuts off right away.
New fuel pump and fuel pump regulator.
Plenty of fuel at shredder valve on fuel rail..
I'm stumped at this point.
Any help would be appreciated
 

·
Super Moderator
Joined
·
40,826 Posts
If it starts and shuts off immediately is there a factory security system on the car? Is there an alarm or security light on the dash? This is how that system behaves.
 
  • Like
Reactions: Bob Lincoln

·
Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
·
24,495 Posts
Welcome to Allpar. Do you have a factory service manual for this car?
Because of the rarity of the AQ-body, this book was usually the one in the best shape. :)
Book Publication Wood Font Flooring


What diagnosis led you to begin with the fuel system? It can have good fuel pressure in the rail, but if the injectors stop squirting, you have no fuel.

Any fault codes? Are the spark plugs wet or dry? Black or white tips?
Does it lose spark or fuel at stall? If you mist an aerosol carb cleaner (or equivalent) into the throttle body, does it keep running? Use caution around flammables as a pop-back could fireball.

Is this the 16-valve Cosworth head or the 8-valve turbo?
If it is the 8-valve, the fuel/ignition system would be similar to a Daytona turbo. If it is the Cosworth, that a whole different animal. I might have service info on it, but it would take some digging.
I think that the Cosworth had a crankshaft position sensor?
 
  • Like
Reactions: World14

·
Registered
Joined
·
1,928 Posts
Map sensor did that on one of my vans. I could catch it with throttle but it wouldn't idle.
 

·
Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
·
24,495 Posts
It may keep running with the MAP connector unplugged?
The PCM will set a default value in place of the missing MAP signal and allow it to run, if the MAP is the problem.
The 'ck eng' light may come on, but that can be turned off later.
 
1 - 5 of 5 Posts
Top