white-gt Posted October 8, 2014 Share Posted October 8, 2014 ok so recently my engine lost compression in 3 cylinders resulting is this im told its bad detenation, now i didnt realise i was running pretty leav for months on end due the the fuel pump gradually dying on me and its only when i went to performance hq to get the map checked as it felt flat russ told me it was about 15 afr at 4000rpm so we eventually changed the fuel pump and it ran fantastic for about 200 miles and then i felt as though it was loosing some power (a thread is in the engine bit). so the engine has been stripped and my engine guy reckons it may be down to the injectors as its only 3 which are really bad and one is fine with just a few score marks on the side. he also suggested the dastek unit i have could have caused this, but its been on the car for a few years now so not sure.. ive ordered new pistons, rings, shells etc but not sure what to do about the injectors as im only running a hybrid setup at the moment and he said i'll need to get the map altered if i changed to bigger injectors. whats your thoughts ? Quote Link to post Share on other sites
_shaun_ Posted October 8, 2014 Share Posted October 8, 2014 You would need to get the map tweaked for bigger injectors. What does your engine lad think is up with the injectors? If he thinks ones fucked you can get them flow tested Quote Link to post Share on other sites
white-gt Posted October 8, 2014 Author Share Posted October 8, 2014 He just thinks their must have been an issue for it to be across all the cylinders .My fuel pump was dying for a while and I never knew so I reckon that hasn't helped. I just don't want it to die again.Would fitting an afr gauge help ? Quote Link to post Share on other sites
_shaun_ Posted October 8, 2014 Share Posted October 8, 2014 Across all cylinders id say its likely the fuel pump issue if it was only one then yea possibly an injector has failed but for them all to fail would be impressive. I run a afr gauge on mine to keep an eye out its always nice but I'd say other gauges like water temp oil temp/ pressure were more important to start. Quote Link to post Share on other sites
white-gt Posted October 8, 2014 Author Share Posted October 8, 2014 Thanks for that Shaun I'll look into it then. But why would it have died after the pump bein changed then ? Quote Link to post Share on other sites
_shaun_ Posted October 8, 2014 Share Posted October 8, 2014 My guess would be the dodgey pump has weakened the engine. Its then been mapped correctly but the damage has been done and it was just a matter of time before it let go. Always kinda guess work unless you can pinpoint an exact part that's failed like an oil pump or something Quote Link to post Share on other sites
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