compression test results
May 28, 2008 | 05:56 AM
#1
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From: Vian, OK
compression test results
ok..so we did the compression test on our brown '86 this past weekend...and it was surprising...
cyl. 1=165
cyl. 2=200
cyl. 3=200
cyl. 4=200
thats odd for them to be that high...isnt it...i've never seen a yota with over 180...in fact thats almost the highest compression i've seen on a 4x4 truck..that isnt modified...of course the 22R has been rebuilt abotu 35,000 miles ago...the mechanic says that its ok..i didnt think there was supposed to be a big variation in the readings...it still spits and sputters...but doesnt die...it died because of a vacuum leak under the breather...
cyl. 1=165
cyl. 2=200
cyl. 3=200
cyl. 4=200
thats odd for them to be that high...isnt it...i've never seen a yota with over 180...in fact thats almost the highest compression i've seen on a 4x4 truck..that isnt modified...of course the 22R has been rebuilt abotu 35,000 miles ago...the mechanic says that its ok..i didnt think there was supposed to be a big variation in the readings...it still spits and sputters...but doesnt die...it died because of a vacuum leak under the breather...
May 28, 2008 | 06:20 AM
#2
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They do seem a tad high... but really the problem is the difference in cyl #1. Looks to be about 17-18% lower than the rest.
I recommend doing a cylinder leakdown test on cylinder #1 to find the source of the compression leak.
I recommend doing a cylinder leakdown test on cylinder #1 to find the source of the compression leak.
Last edited by zlathim; May 28, 2008 at 06:21 AM.
May 30, 2008 | 07:22 AM
#4
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From: Vian, OK
ok..so what the hell is wrong with my truck....sometimes it will run fine...other times it will blow blue and white smoke...and have the power as if its running on 3cylinders...anybody have any ideas....
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May 30, 2008 | 08:48 PM
#8
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From: Temecula Valley, CA
How do the plugs look?
The compression appears ok on #1 but the others are a tad high.
Pardon me if you've mentioned it before elsewhere, but have you done any work on the engine recently?
The compression appears ok on #1 but the others are a tad high.
Pardon me if you've mentioned it before elsewhere, but have you done any work on the engine recently?
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