1995 mARK VIIII NOT STARTING

FrankenStang · Oct 10, 2012

my brothers 95 mark 8 cranks, has fuel pressure as i checked the shrader valve twice BUT when hes cranking the fuel guage goes above full and i believe it has no spark..reason i dont think it has spark is as he was cranking i pulled a plug wire to check to see if it arced and not a spark of any sorts..what could i check? i checked all the fuses and they all checked out and seemed to be ok and the intertia switch wasnt tripped...the battery is ok and the car ran fine just yesterday with no issues or anything...idea's or things i should check..?

FrankenStang · Oct 10, 2012

crank posistion sensor?

CC'S95GT · Oct 10, 2012

4.6? crank sensor, cam sensor. Pull codes.

MustangChris · Oct 10, 2012

Check the coil packs. they can crack.

check the battery connections and make sure the ground is grounded to the ground.

you could pull the coil packs off your car and swap them with his. that would rule those out if your car is running fine.

is it throwing codes? a bad crank posi. sensor would throw a code, i assume. Plus, those are pretty bullet-proof. They are just a magnet sensor....

FrankenStang · Oct 10, 2012

yaa maby i mean cam position sensor...i belive its down by the ac comprsssor on the 4v...they are 3 month old screaming demon coilpacks with livewire wires also and looked to be in egh conditikon as i seen oxidation on the ends of his plug wires where they conected to the coilpacks because his dumbass didnt use boot grease...

MustangChris · Oct 10, 2012

cam position sensors are on the front of the timing covers (drivers side, if i recall correctly)
crank positioning sensor is on the passenger side of the engine down low, behind the a/c compressor (not sure if thats where the a/c compressor is on the mark engines) on the front of the engine. Its basically a 1.5" long post that points towards the crankshaft behind the harmonic balancer.... ... if any of that made sense. lol.

chrisv_10 · Oct 10, 2012

MustangChris said:
cam position sensors are on the front of the timing covers (drivers side, if i recall correctly)
crank positioning sensor is on the passenger side of the engine down low, behind the a/c compressor (not sure if thats where the a/c compressor is on the mark engines) on the front of the engine. Its basically a 1.5" long post that points towards the crankshaft behind the harmonic balancer.... ... if any of that made sense. lol.

yeah its the same on the mark. its a 4.6

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vermilion · Oct 10, 2012

check the crank sensor. the car will struggle forever but it wont get a timing signal.

FrankenStang · Oct 10, 2012

FIXED IT....did some researching and packed my lil girl up and headed on over there..got there and found him FKing in the trucnk with the intertia swicth after i TOLD him its not a fuel problem and he has no clue whats hes doing anyways...so i unplugged the sensor and used brake cleaner on the snesor and the connector and wiped off all the sht off of it...come to find out on these cars its a common issue as that sensor is exposed to road debree kickup...so cleaned it and plugged it back in and told him to turn it over...he was skeptical and we also couldnt hear the fuel pump prime either...well, she fired rite on up....TA DA....lock the thread please as another 4.6 is running again..