white-gt Posted August 20, 2014 Share Posted August 20, 2014 so i went to see Russ to sort my map out but it didnt all go to plan! after hours of waiting i finally got on the rollers to descover she was only giving 4 bar max fuel pressure and was at 15 AFR by 4.5k rpm so after narrowing down where the fault was after 3 hours we discovered the fuel pump was gubbed so once we changed the pump we had ran out of time to look at the map but when we done a compression test it only came back at 150psi across them all and yet 2 years ago it was 180psi so should i be worried? once the fueling was re checked we left it their until i can get the map re checked Quote Link to post Share on other sites
white-gt Posted August 21, 2014 Author Share Posted August 21, 2014 I know I don't have money for a rebuild so not sure what to do with it..Test was done with wot, plugs out and warm.. Quote Link to post Share on other sites
_shaun_ Posted August 21, 2014 Share Posted August 21, 2014 Mine came back super low compression aswell. Provided it balanced over all cylinders it should be fine. I take it its a stock engine? Quote Link to post Share on other sites
Idrees Posted August 21, 2014 Share Posted August 21, 2014 As above, I would't worry if it's a consistent 150psi across all 4 cylinders. Quote Link to post Share on other sites
white-gt Posted August 21, 2014 Author Share Posted August 21, 2014 It had piston rings and head gasket changed before I bought it back 2012. But stock block Yeh Quote Link to post Share on other sites
Phil Posted August 21, 2014 Share Posted August 21, 2014 aye the chances of all four doing something strange are unlikely. either one of your tests wasnt done perfect or the comp test kit was reading funny. did you use the same comp tester? has it been dropped between times? if you test them and one is way low or even two, then id worry. all the same = more than likely grand. Phil Quote Link to post Share on other sites
white-gt Posted August 21, 2014 Author Share Posted August 21, 2014 the comp tester was different, last time i used Iain who is well known on the other forum, i wasnt there to see it i just have it on my receipt. im not sure what you mean by dropped? looking again cyl 1,2,3 are 150psi and cyl 4 is 155 so pretty much the same Quote Link to post Share on other sites
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