some of you realise that my RA coolant seal failed. and i've sent for another rebuild with Mazda OEM coolant seals.

during the rebuild, i changed my center housing as well due to the chipping at the corner is getting deeper.

i encounter that my 550 cc injectors are a little bit leaky.. not flooding the whole region, but can see the fuel mark around there. found out that my injector top body started to have some hairline crack.

so, i changed another SET of 550 cc injector including the rails. so i took it out for cleaning, including my 850ccs i took it out and sent for cleaning.

everything goes back in my engine bay, with extra compression reading... it was reading 7.3 for the front and 8.3 for the rear. and after putting everything back in, the compression went up to 9.2 and 9.3. (old housing, old RA classic seals)


1st thing i realise..... my engine is not revving as happy as previously... when it's going up the RPM... i feel hessitation...i tried bumping more fuel by adding some value at the fuel correction map. but it's still hessitating, at 0.94 BAR... while at 0.83 bar... it's revving up correctly without any hessitation....at 0.65 bar and 0.5 bar... it's giving me knock at high RPM...

will all my problem relate to the injectors ? shall i give it awhile until the injector suits itself before they inject correctly?

i did an AFR check... when i feel the hesitation, it's at AFR 10.2 to 10.3... i tried to use back my old map which was last time it's running 11.3 to 11.4 on WOT... it still having the same hesitation...

any ideas ? shall i premixing it to see if the engine revs up smoothly?

 

helppppppppppp

 

Dude you need to break in the engine. have you done so?