Cranks over but won't start

5

Asked by May 05, 2017 at 12:46 AM about the 2001 Mercury Grand Marquis

Question type: General

Was driving down the road, car was running good then died. Changed fuel
pump, filter & cam sensor. Checked inertia switch. Getting fuel to rail & fire to
plugs. Checked all fuses. When cranking it over it will make a whistling noise
sometimes. Any & all help will be greatly appreciated. Thanks

5 Answers

5,585

timing belt/chain ? take the oil fill cap off and see if the rockers are moving when you crank the engine . Some vehicles are particular about fuel pressure , just having it won't do .

5

Thanks for the tips. Rocker arms are moving and check fuel pressure with gauge and it within specs. Still trying to troubleshoot it. Thanks again beatupchevy!

5,585

are the injectors firing ? If you pour some gas in the throttle will it fire up ?

5

I'm really aggravated & confused! Still can't get the car to start! It cranks over great but won't hit. Put fuel pump & filter in. Getting fuel to the rail & it's in specs & holding pressure. Fuel regulator is working. Put new crank & cam sensor in. I've got compression on all 8 cylinders in specs. Coil packs are putting out correct specs. Reset anti-theft system. I've tried staring fluid with & without throttle open. I've checked & even extra grounded it. It did act like it was going to start after replacing crank sensor. It also will hit if you unplug all 8 coil packs! Plugs are firing. I'll just about try any ideals!! Thanks for reading.

5,585

check the timing , not sure if there are timing marks , you'll probably need real time data on a analyser

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