Long Crank Time '86 Supra MKII

443 Views 2 Replies 3 Participants Last post by supra_toy, 2 mo ago

PSU86MKII

Discussion Starter · 3 mo ago

Hello, I'm having trouble determining the reason my supra is slow to start. Cold or warm after sitting awhile (more than 5 or 10 minutes) it takes about 20-25 seconds to start. Cold start injector was replaced with no change. Now, I tried turning the ignition on but not cranking waiting about 20 seconds, start cranking and it starts after 2-3 seconds. All of this without depressing the pedal. Any ideas? Could this mean its losing fuel pressure? How would I check this? I see no evidence of leaking anywhere, no fuel odors. Also, just replaced plugs, wires, cap and rotor. Once its running it runs great with no indication of a problem. Thank you..

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Beernuts

· #2 · 2 mo ago

Older pumps (or if you have too much debris in the tank?) may leak back into the tank, but should start quicker than that anyway. You could try mounting a fuel pressure gauge on the fuel rail to see if the pressure drops, and also try to prime it with a MAF strap to rule out other problems. (shorting the little two prong connector coming out of the MAF should make the fuel pump run as soon as you turn the key to ignition mark.)
Since it starts quick when you 'prime' the ignition, I actually doubt my suggestions will solve the problem..

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