giantrobot9000 Posted June 16, 2007 Report Share Posted June 16, 2007 The car is a 94 850 Turbo with 296k miles on it.This is what I got-#1-155psi#2-170psi#3-165psi#4-160psi#5-152psiPlease let me know if that is decent.What percentage of variance is acceptable? Link to comment Share on other sites More sharing options...
matt b Posted June 16, 2007 Report Share Posted June 16, 2007 Given the mileage, that's not too bad. Link to comment Share on other sites More sharing options...
RussB Posted June 17, 2007 Report Share Posted June 17, 2007 The car is a 94 850 Turbo with 296k miles on it.This is what I got-#1-155psi#2-170psi#3-165psi#4-160psi#5-152psiPlease let me know if that is decent.What percentage of variance is acceptable?well, what's your Haynes manual have to say about it? Is your motor warm, throttle body open and ECU disengaged (by removing fuse #1) while performing the comp test? Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted June 17, 2007 Report Share Posted June 17, 2007 If memory serves me correctly that sounds about right given the mileage. Any reason for doing the compression test? Link to comment Share on other sites More sharing options...
TM850R Posted June 17, 2007 Report Share Posted June 17, 2007 If memory serves me correctly that sounds about right given the mileage. Any reason for doing the compression test?Another thread of his was about some blow by. He just needs to service/replace his PCV system and he should be fine for the smoke coming out of his oil dipstick. Link to comment Share on other sites More sharing options...
850newb Posted June 17, 2007 Report Share Posted June 17, 2007 Is your motor warm, throttle body open and ECU disengaged (by removing fuse #1) while performing the comp test?Not to jump in but what is the particular reason behind pulling the ECU fuse? I pulled the injector connectors while doing mine, it's accomplishing the same exact thing right? Link to comment Share on other sites More sharing options...
RussB Posted June 17, 2007 Report Share Posted June 17, 2007 Not to jump in but what is the particular reason behind pulling the ECU fuse? I pulled the injector connectors while doing mine, it's accomplishing the same exact thing right?Pulling the ECU fuse cuts fuel & and spark, and it is very easy to do......Any reason for doing the compression test?A compression test should be one of the FIRST things you do to your (used) car.That way you have a baseline of the engine's overall health. Link to comment Share on other sites More sharing options...
giantrobot9000 Posted June 18, 2007 Author Report Share Posted June 18, 2007 well, what's your Haynes manual have to say about it? Is your motor warm, throttle body open and ECU disengaged (by removing fuse #1) while performing the comp test?The motor was warm,but I only pulled the #2 fuel pump fuse,and didn't have the throttle open.Maybe I should do it over.....? I don't want to,though.I like the results!If memory serves me correctly that sounds about right given the mileage. Any reason for doing the compression test?I just didn't want to dump money into the car if it didn't have a healthy engine to begin with. Link to comment Share on other sites More sharing options...
bus stop Posted June 18, 2007 Report Share Posted June 18, 2007 The lowest number (152/153 psi) is right at the 10% mark from the highest number (170psi). With such high mileage...I say those are some very decent number. Try to see if you want to do it again with the Throttle Open.......it may show a better result. Link to comment Share on other sites More sharing options...
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