Hey Guys,
New to the forum here. Just looking to get a second opinion here.
I'm 16 and just completed a 4g94 engine swap into a 1998 CE Mirage. I rebuilt the engine with CP Carillo high compression pistons (11.5:1) and K1 connection rods. Currently running SOHC head with stock cams. I got the engine in and is now running smoothly (thanks to LLT racing for the reflash), but it does have this problem which Im having trouble figuring out.
Between pretty much idle and 3,000rpm it has a major flat spot. A flat spot as in it seems to bog down, not make much power and very slowly increase in RPM. What I have figured out is this only occurs in 2nd gear or higher (something to do with load being on the engine??). It also only occurs when you put the throttle past 50%. Anything before that and the engine runs fine, its just after that 50% throttle that it bogs down. When i was getting tuned we could see that when the engine 'bogs down' it is running very rich. It goes from around 13.9:1 to 9.8:1. Once it reaches 3k RPM you can floor it and it takes off without any worries at all.
In my attempt so far I have changed the manifold and throttle body to the 4g93. Im running 4g93 MAF and TPS. 4G94 injectors, 4g93 ECU. Exhaust is stock however the cat has been punched out and muffler replaced with a high flow muffler. Not really sure what else would be causing this. Any ideas or theories would be much appreciated
Cheers,
Sam
New to the forum here. Just looking to get a second opinion here.
I'm 16 and just completed a 4g94 engine swap into a 1998 CE Mirage. I rebuilt the engine with CP Carillo high compression pistons (11.5:1) and K1 connection rods. Currently running SOHC head with stock cams. I got the engine in and is now running smoothly (thanks to LLT racing for the reflash), but it does have this problem which Im having trouble figuring out.
Between pretty much idle and 3,000rpm it has a major flat spot. A flat spot as in it seems to bog down, not make much power and very slowly increase in RPM. What I have figured out is this only occurs in 2nd gear or higher (something to do with load being on the engine??). It also only occurs when you put the throttle past 50%. Anything before that and the engine runs fine, its just after that 50% throttle that it bogs down. When i was getting tuned we could see that when the engine 'bogs down' it is running very rich. It goes from around 13.9:1 to 9.8:1. Once it reaches 3k RPM you can floor it and it takes off without any worries at all.
In my attempt so far I have changed the manifold and throttle body to the 4g93. Im running 4g93 MAF and TPS. 4G94 injectors, 4g93 ECU. Exhaust is stock however the cat has been punched out and muffler replaced with a high flow muffler. Not really sure what else would be causing this. Any ideas or theories would be much appreciated
Cheers,
Sam