Inkdlyfe
Proven Member
- 438
- 8
- Feb 23, 2016
-
Summer feild,
Florida
Before i start yes i understand there is many treads on this subject and Ive read up on most of them even on different places but still cant seem to get this answer...
ok so i did a full rebuild on my 420A-T went all out with it spent alot more money then i really wanted to buying
head bolts and bottom bed plate bolts
-crower springs and valves
-Wisco .50 over pistons with wisco 50 over rings (matching the piston specs)
-Eagle H beam rods
-Kings main and rod bearings
along with new
-Crank shaft
-oil pump
-water pump
-idler pully
-tentioner
-lower sprokets
and ALLLLL new seals completely even ones recently installed and new sensors through out the whole engine
yes everything is torqued down and nothing was short cutted outta anything done the right way and took my time with it, when finally getting the motor done and dropped in i went to crank the first time and nothing, found out the problem fixed it there was a plug connecting the starter to the main harness it wasnt connected to did that and bam started up....BUT it wouldnt idle on its own i would have to keep the throttle open in order to keep the car running,,,, came back to the car the next day did the same thing couldnt figure it out then the next day it wouldnt start at all no crank nothing found out my CAS was bad from the store. replaced that now fired up but now sounds like a reallly bad misfire like a helicopter is behind me if you try and reve it up it dont wanna do anything in response to how it should due to throttle postion, and then would randomly spike to 4k and hold there then die out, yes Ive tried removing the tps does the same thing and yes i do have a new tps.... so i figured compression test is now called for, got s compression test and now this is where i am now and stuck more then ever cuz there is ZERO compression at all... but engine was starting? yes i have fuel yes i have spark and yes ALL the timing marks are in line for sure and started at tdc, but u can feel air coming from each clyinder while cranking wiht no plugs... after doing like 4 compression tests on each one i decided to fill the cylinders with air instead and this lost me ... try to follow me on this its bout to get confusing
in time 1st clyinder is tdc when filling them with air this is the results
1-air in intake 4 air in exhaust
2 and 3 air in valve cover
1/4 turn now 2nd tdc
1 and 4 valve cover
2-inatke 3 exhaust
1/4 turn
1 intake 4 exhuast
2 and 3 Valve cover
1/4 turn
1 and 4 valve cover
2 exhaust 3 intake
ive done this order 4 times and been the same each and every time im not sure if i wasnt paying attenon right but i coulda swore the first time i done it when 1 was exhuast 4 was also vise versa each time for each cylninder not diff each time,,,, and keep in mind when the air was coming out of the valve cover a extreme amount of air exited out of the tester tube,,, after putting eveything back into the right loaction i went to start and now the car dosnt even want to fire.... cant figure out why at all... it cranks and cranks and cranks nothing i am getting spark for sure though after cranking a few times it like i dont know struggles on good time and like poofs and crank crank crank again and poof like a large ammount of air coming through the exhaust,,,, YES all timimg marks are in line for sure... what is going on here ,,, ????
ok so i did a full rebuild on my 420A-T went all out with it spent alot more money then i really wanted to buying
head bolts and bottom bed plate bolts
-crower springs and valves
-Wisco .50 over pistons with wisco 50 over rings (matching the piston specs)
-Eagle H beam rods
-Kings main and rod bearings
along with new
-Crank shaft
-oil pump
-water pump
-idler pully
-tentioner
-lower sprokets
and ALLLLL new seals completely even ones recently installed and new sensors through out the whole engine
yes everything is torqued down and nothing was short cutted outta anything done the right way and took my time with it, when finally getting the motor done and dropped in i went to crank the first time and nothing, found out the problem fixed it there was a plug connecting the starter to the main harness it wasnt connected to did that and bam started up....BUT it wouldnt idle on its own i would have to keep the throttle open in order to keep the car running,,,, came back to the car the next day did the same thing couldnt figure it out then the next day it wouldnt start at all no crank nothing found out my CAS was bad from the store. replaced that now fired up but now sounds like a reallly bad misfire like a helicopter is behind me if you try and reve it up it dont wanna do anything in response to how it should due to throttle postion, and then would randomly spike to 4k and hold there then die out, yes Ive tried removing the tps does the same thing and yes i do have a new tps.... so i figured compression test is now called for, got s compression test and now this is where i am now and stuck more then ever cuz there is ZERO compression at all... but engine was starting? yes i have fuel yes i have spark and yes ALL the timing marks are in line for sure and started at tdc, but u can feel air coming from each clyinder while cranking wiht no plugs... after doing like 4 compression tests on each one i decided to fill the cylinders with air instead and this lost me ... try to follow me on this its bout to get confusing
in time 1st clyinder is tdc when filling them with air this is the results
1-air in intake 4 air in exhaust
2 and 3 air in valve cover
1/4 turn now 2nd tdc
1 and 4 valve cover
2-inatke 3 exhaust
1/4 turn
1 intake 4 exhuast
2 and 3 Valve cover
1/4 turn
1 and 4 valve cover
2 exhaust 3 intake
ive done this order 4 times and been the same each and every time im not sure if i wasnt paying attenon right but i coulda swore the first time i done it when 1 was exhuast 4 was also vise versa each time for each cylninder not diff each time,,,, and keep in mind when the air was coming out of the valve cover a extreme amount of air exited out of the tester tube,,, after putting eveything back into the right loaction i went to start and now the car dosnt even want to fire.... cant figure out why at all... it cranks and cranks and cranks nothing i am getting spark for sure though after cranking a few times it like i dont know struggles on good time and like poofs and crank crank crank again and poof like a large ammount of air coming through the exhaust,,,, YES all timimg marks are in line for sure... what is going on here ,,, ????
I sware if I'm not outta gas and I just spun ANOTHER set of cams Imma freak 
