Need Help Please!!!
Thread Starter
Junior Member
Joined: Jan 2017
Posts: 11
Likes: 0
From: Oklahoma
okay gentlemen,
installed new coil and it fixed my problems! was a little concerned at first because i had a stutter, misfire and kinda a rotten smell with a strange liquid dripping out of the tailpipe. couldn't have been i had my spark plug cables crossed cause i triple checked that... wrong! after getting the wires ran right all was well. Now, i went ahead and did a compression test... This is the first time i have ever done this so please be nice
I disconnected ignition coil and pulled all plugs. After the fact i read where you're supposed to pull the fuel relay (this would explain the gas i was smelling) and depress the gas pedal too. (didn't do that either). but this is what i got.
Cylinder:
1st test
1: 160
2: 160
3: 150
4: 160
5: 160
6: 170
2nd test (with a shot of oil)
1: 190
2: 205 (might have shot too much oil in there)
3: 180
4: 170
5: 190
6: 175
Please tell me if failing to pull the fuel relay and failing to depress the gas pedal compromised the accuracy of my test. Also, I have read where 100psi is the minimum and you should expect no greater than a 15% deviation between the cylinder with most compression and the one with least compression. Is this true? and finally (and most importantly)... what do these numbers mean for the health of my engine? Thank you all so much for you time and patience!
installed new coil and it fixed my problems! was a little concerned at first because i had a stutter, misfire and kinda a rotten smell with a strange liquid dripping out of the tailpipe. couldn't have been i had my spark plug cables crossed cause i triple checked that... wrong! after getting the wires ran right all was well. Now, i went ahead and did a compression test... This is the first time i have ever done this so please be nice
I disconnected ignition coil and pulled all plugs. After the fact i read where you're supposed to pull the fuel relay (this would explain the gas i was smelling) and depress the gas pedal too. (didn't do that either). but this is what i got.
Cylinder:
1st test
1: 160
2: 160
3: 150
4: 160
5: 160
6: 170
2nd test (with a shot of oil)
1: 190
2: 205 (might have shot too much oil in there)
3: 180
4: 170
5: 190
6: 175
Please tell me if failing to pull the fuel relay and failing to depress the gas pedal compromised the accuracy of my test. Also, I have read where 100psi is the minimum and you should expect no greater than a 15% deviation between the cylinder with most compression and the one with least compression. Is this true? and finally (and most importantly)... what do these numbers mean for the health of my engine? Thank you all so much for you time and patience!
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,631
From: MI
Just another comparison to cross check yourself, -
http://www.f150online.com/forums/art...ml#post4295903
Not sure I'd trust the guy who put that one up..something to look at anyway.
Hope it helps.
http://www.f150online.com/forums/art...ml#post4295903
Not sure I'd trust the guy who put that one up..something to look at anyway.
Hope it helps.