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1991 Ford Escort #4 Cyl. Not firing

Tiny
SOPHIE1460
  • MEMBER
  • 1991 FORD ESCORT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 14,600 MILES
Engine has compression, it is getting spark " used three different plugs, changed fuel injector. And still runs rough.
When I pull plug wires one at a time #4 make no change in how it is running, also check fuel pressure it is within specs. Computer maybe ! Please Help !
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Sunday, August 8th, 2010 AT 1:38 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi sophie1460,

Thank you for the donation.

Check the fuel injector wiring circuit. Unplug the connector and test the White/Red wire for battery voltage with ignition switch turned ON. If voltage is not available, check for broken wire between the injector terminal and the wire, which is spliced to wire of same color of all other injectors.

If voltage is available, check the Yellow/Black wire for continuity to the Yello wire of injector of # 2 cylinder. If continuity is not found, check the wire for an open, they should be connected.
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Sunday, August 8th, 2010 AT 2:02 AM

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