Question about 1990 Ford Mustang
When the mass airflow sensor is plugged in the engine shuts down. looks like the timing is jumping around a little bit but its probably because the engine isnt running that great. just replaced the timing chain and new distributor and timed it befor I took the engine out to paint the fire wall. It was running great before. What should I do next
Try another mass airflow sensor. I know they're expensive to buy....but if you could find another good used one to try....
Posted on Jan 09, 2013
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Posted on Jan 02, 2017
SOURCE: 1990 Ford Mustang Start Problem
Ok... if you want to save a boat load of cash, DO NOT go to a dealer... they will tell you what you already know and start replacing every thing until they find the problem.and then charge you for parts that didnt need to be replaced to begin with. I also own an '87... and had the same problem... it turned out to be ..the ignition module.. it's located on your distributor , just below your dist. cap. it' a $40 part from NAPA. You can EASILY replace it within 10 minutes. HOWEVER you will need the "special tool " it costs about $4 dollars. Make sure you have some bright colored nail polish or a paint stick handy to mark the position of the distributor. YOU WILL PROBABLY BE BETTER OFF WITH A TIMING LIGHT . Not neccessary but just to make sure your timing is right on.
1) Un plug ignition module.
2) Loosen distributor hold down bolt.
Enough so you can move the distributor
JUST LOOSEN DO NOT REMOVE..!!!
3) Turn distrbutor counter clockwise enough to get the"special tool" into the holes to remove the TWO screws.
4) DO NOT pull ignition module out. It is plugged in.
Push module down towards the floor until it releases.
Then take it out.
5) Clean off contact area on distributor (thats the flat area that the module was pressed up against) with brake cleaner or electrical parts cleaner, etc.
6) Apply the greasy stuff that came with your new module to the contact area of the module.Just put it on there with your finger.
7) Place the module back into position .
REMEMBER to slide it UP.
8) Tighten the TWO screws back up using your newly accuired "special tool"
9) Plug the wiring harness back into the the module.
10) NOW this is the part you will either find easy as pie or hard as hell..Hope fully you marked the position of your distributor with the paint stick or nail polish. If you did . Match the marks back up , and you should be good to go .
****** If you didn't mark the position it's ok...*******
(if you have a timing light) The factory setting is 10 degrees..you should see the white mark THATS TEN DEGREES.....
IF YOU WANT TO GIVE IT A LITTLE MORE "GET UP AND GO" SET THE TIMING BETWEEN 12-14 DEGREES.
REMEMBER TO REMOVE YOUR SPOUT CONNECTOR WITH THE CAR OFF ,
THEN WITH CAR STILL RUNNING RECONNECT IT.
THE SPOUT CONNECTOR LOOKS LIKE A DEAD END WIRING HARNESS THATS JUST TO THE RIGHT OF THE DISTRIBUTOR.
it has a removable dead end connection .thats the spout connector. DO NOT LOSE IT .
Posted on Jul 05, 2008
IT ALMOST SOUNDS LIKE YOU MAY HAVE A VACUUM LEAK SOMEWHERE. USE A LENGTH OF RUBBER HOSE AND HOLD IT UP TO YOUR EAR TO PIN-POINT THE LOCATION OF A VACUUM LEAK. HOPE THIS HELPS. LET ME KNOW PLEASE. THANK YOU IN ADVANCE FOR AN HONEST RATING AND THANKS FOR USING FIX-YA. P.S. EGR VALVE IS VACUUM ACTUATED
Posted on May 07, 2009
check compression on each cylinder and fuel pressure,I dont know if you have the tools,but for that engine whit 200,000 miles,I think the compression is down,at least you got to have 75 of compression on each cylinder.
Posted on Oct 21, 2010
SOURCE: service engine light came on
Cylinder 1 is not firing or is intermittently firing. Check the output on the coil associated with #1 cylinder by using a spare plug attached to #1 wire while engine is running. If it has good spark, check the fuel injector for possible problems. Crank shaft sensor would not be the problem as the engine has to have it to run. You may need to have it checked further at a reputable repair shop as this can get more involved than a back yard repair.
Posted on Mar 15, 2011
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