Extended crank on cold start, pulse injectors?
01-23-2014, 03:45 PM
#1
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Extended crank on cold start, pulse injectors?
Hope I can explain this right. 89 TPI that has always been hard to start when cold. Cranks over 8, 10, 15 revs before it lights off. I can hit the starter for a few seconds, wait, hit it again and seems to start a bit quicker. Fed up. So question is, can I put a momentary contact switch to a couple relays and give the injectors a ground signal when starting to give the engine a shot of gas? Would this grounding affect the ECM? Will the injectors handle the full current for a couple seconds? Any other ideas? Don't want to go carb. Thanks.
01-23-2014, 04:01 PM
#2
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Extended crank on cold start, pulse injectors?
Check fuel Pump relay and oil psi sensor/switch circuits , its easy.
Last edited by TTOP350; 01-24-2014 at 07:57 AM.
01-23-2014, 06:33 PM
#4
Re: Extended crank on cold start, pulse injectors?
Sorry, I was looking at your profile year 88, 89 the ecm must see 8 DRP and a rpm signal of 400 or higher to enable the injectors on startup. check your prime fuel pressure and condition of your up coil, magnetic pole for cracks and icm connections.
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