1987 5.0 speed density Foxbody crank no start

• spark was good with tester
• compression which was around 100psi not good but i assume good enough to start
• fuel relay clicks, fuel pressure was 35psi and fuel pump primes with fuel actually reaching the cylinders after inspecting and removing spark plugs
• ECU good no issues with capacitors
• Inertia switch was not activated
• Timing is set with new distributor
• Spark plugs are new and gapped to spec
• New battery
• New mini starter replaced early last year
• New neutral safety switch
• New ignition switch replaced early last year

Mcmahst said:

First, welcome. Have you pulled codes? That’s the place to start. A few questions that might help others more knowledgeable here. How did you set timing? Since you have spark and fuel, timing is suspect. Have you tried a shot of starter fluid? Good luck.

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AeroCoupe said:

Here you go. Read through this completely. Once you understand what all is involved work through it methodically and do not skip a single step.

Thread 'Cranks OK, but No Start Checklist for Fuel Injected Mustangs'

May 22, 2006

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995

A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work your way down. Jumping around will possibly cause you to miss just what you need to see to find and fix the problem. Don’t skip any steps because the next step depends on the last step working correctly.

Revised 26-Jul-2017 to add fuse link diagram.

All text applies to...

• jrichker
• Replies: 93
• Forum: Fox 5.0 Mustang Tech

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