Dry Compression results - cyl4 a little off
Thread Starter
Member
Joined: Jul 2005
Posts: 121
Likes: 6
Dry Compression results - cyl4 a little off
hey guys
just got a dry compression test done (115K on the engine). Fuel relay was unplugged. Car warmed up.
Cyl1 150
Cyl2 150
Cyl3 155
Cyl4 175 (passenger side by the firewall)
Cyl5 155
Cyl6 155
Cyl7 158
Cyl8 165
Q: Cyl3 -> Cyl4 diff of 20psi. Should i be concerned? What could cause this?
just got a dry compression test done (115K on the engine). Fuel relay was unplugged. Car warmed up.
Cyl1 150
Cyl2 150
Cyl3 155
Cyl4 175 (passenger side by the firewall)
Cyl5 155
Cyl6 155
Cyl7 158
Cyl8 165
Q: Cyl3 -> Cyl4 diff of 20psi. Should i be concerned? What could cause this?
Member
Joined: May 2017
Posts: 116
Likes: 7
From: Gainesville, Georgia
09 E63, 92 VR4, 94 VR4, 85 MR2
Though the fuel relay was out, could have had some residual pressure. I wouldn't worry about it tbh. You can redo the test after you bleed off the fuel pressure and see if the results change.
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Joined: Jun 2008
Posts: 3,834
Likes: 65
From: Texas
2003 CL55
hey guys
just got a dry compression test done (115K on the engine). Fuel relay was unplugged. Car warmed up.
Cyl1 150
Cyl2 150
Cyl3 155
Cyl4 175 (passenger side by the firewall)
Cyl5 155
Cyl6 155
Cyl7 158
Cyl8 165
Q: Cyl3 -> Cyl4 diff of 20psi. Should i be concerned? What could cause this?
just got a dry compression test done (115K on the engine). Fuel relay was unplugged. Car warmed up.
Cyl1 150
Cyl2 150
Cyl3 155
Cyl4 175 (passenger side by the firewall)
Cyl5 155
Cyl6 155
Cyl7 158
Cyl8 165
Q: Cyl3 -> Cyl4 diff of 20psi. Should i be concerned? What could cause this?
That`s not bad at all. How many miles?
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
