Rebuild my RX8 13b Engine, but doesn't start? Please help
#1
Rebuild my RX8 13b Engine, but doesn't start? (Solved)
Hi all
I need some help, my apex seal broke and i decided to rebuild the engine, also bought a new front rotor housing because it was damaged, the same one with the broken apex seal.
Me and my Dad is doing the rebuild, he is a mechanic
Started the rebuild everything was going good until today, when we wanted to start it. We then push started it, it start but sounded little loud like one of the spark plugs where not firing and had no power also didn't idle and keeps fluding
So thinking it was the spark plugs or coils, we tested the coils, all was working, testing the plugs, found a dead one, replaced it.
Compression is there and she starts up idle for +-10 sec and then she starts loosing rpm's and dies
Did we put the rotors in wrong? we put the back rotor 12 o'clocke and the front rotor 6 o'clock
Can it be the timing? The Eccentric shaft position plate?
At the oxgen censor near the transmission there are 2 white plugs and 2 black plugs, i put white in white connectors and black in black connectors, does it matter if i there are swaped?
Please ask me if anyone needs more details
Ty for Helping
Here is the picture from the manual we used on the rebuild:
I need some help, my apex seal broke and i decided to rebuild the engine, also bought a new front rotor housing because it was damaged, the same one with the broken apex seal.
Me and my Dad is doing the rebuild, he is a mechanic
Started the rebuild everything was going good until today, when we wanted to start it. We then push started it, it start but sounded little loud like one of the spark plugs where not firing and had no power also didn't idle and keeps fluding
So thinking it was the spark plugs or coils, we tested the coils, all was working, testing the plugs, found a dead one, replaced it.
Compression is there and she starts up idle for +-10 sec and then she starts loosing rpm's and dies
Did we put the rotors in wrong? we put the back rotor 12 o'clocke and the front rotor 6 o'clock
Can it be the timing? The Eccentric shaft position plate?
At the oxgen censor near the transmission there are 2 white plugs and 2 black plugs, i put white in white connectors and black in black connectors, does it matter if i there are swaped?
Please ask me if anyone needs more details
Ty for Helping
Here is the picture from the manual we used on the rebuild:
Last edited by jgouws; 11-11-2012 at 05:19 AM.
#3
#4
You just say the compression is fine but did you actually test it? what are the numbers?
Is the ignition wiring straight? swapping coil connectors or wires can lead to similar problems.
What did you use to rebuild the engine? There's a huge chance that it is just a botched rebuild.
Is the ignition wiring straight? swapping coil connectors or wires can lead to similar problems.
What did you use to rebuild the engine? There's a huge chance that it is just a botched rebuild.
#5
You just say the compression is fine but did you actually test it? what are the numbers?
Is the ignition wiring straight? swapping coil connectors or wires can lead to similar problems.
What did you use to rebuild the engine? There's a huge chance that it is just a botched rebuild.
Is the ignition wiring straight? swapping coil connectors or wires can lead to similar problems.
What did you use to rebuild the engine? There's a huge chance that it is just a botched rebuild.
When you speak about the ignition wiring, do you mean the wires from the coil to the spark plugs? if so yes they are straight and they are connect as follow:
What I used to rebuild the engine, i guess you mean the parts, the are all original Mazda parts ordered according to my vin number.
#6
Yes but what parts did you replace?
I would double check all the vacuum hoses, solenoids, wiring etc and then do a compression test with a real rotary compression tester. Needle ones don't work
I would double check all the vacuum hoses, solenoids, wiring etc and then do a compression test with a real rotary compression tester. Needle ones don't work
#7
These are the parts I replaced and a new pilot bearing and Clutch disk
#9
#11
Just some feedback, we pulled out the engine again to open her up and see what we did wrong. We build it 100% correct, but what we did notice is that the back rotor didn't have any carbon on it, it was completely clean so no firing/explosion was happening on the rear rotor. The front rotor had carbon on it, so firing/explosion was happing on it, so the engine only ran on one rotor. Anyone can tel me where to look for the problem?
Please note that all spark plugs and coils are firing, can it be that the rear rotor isn't getting any fuel?
Thank everyone that has helped.
Please note that all spark plugs and coils are firing, can it be that the rear rotor isn't getting any fuel?
Thank everyone that has helped.
Last edited by jgouws; 10-21-2012 at 02:42 AM.
#13
My car is running again!!!
The problem was cabling of the fuel injectors, plugged them in at the wrong places She starts and purrs like a kitten now
Here are the diagrams for anyone who may have the this problem.
Diagram:
Colour Code:
https://www.rx8club.com/attachments/...ng-2005-fi-gif
Thank you everyone that help.
The problem was cabling of the fuel injectors, plugged them in at the wrong places She starts and purrs like a kitten now
Here are the diagrams for anyone who may have the this problem.
Diagram:
Colour Code:
https://www.rx8club.com/attachments/...ng-2005-fi-gif
Thank you everyone that help.
#15
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congrats on your rebuild
My car is running again!!!
The problem was cabling of the fuel injectors, plugged them in at the wrong places She starts and purrs like a kitten now
Here are the diagrams for anyone who may have the this problem.
Diagram:
Colour Code:
https://www.rx8club.com/attachments/...ng-2005-fi-gif
Thank you everyone that help.
The problem was cabling of the fuel injectors, plugged them in at the wrong places She starts and purrs like a kitten now
Here are the diagrams for anyone who may have the this problem.
Diagram:
Colour Code:
https://www.rx8club.com/attachments/...ng-2005-fi-gif
Thank you everyone that help.
#18
low compression after rebuild
Hi, Before I re build the engine the compression 4 bar's. After rebuilding the engine it was again 4 bar's. The problem is that when the engine is cold the car starts, when the it's hot it doesn't. I'm wondering if after rebuilding the engine that the engine must be working for some hour to make more compression. Because I just started it for 20 minutes and I didn't move or drive it yet. I Need some help, if any one knows what should I do to solve my problem. Please message me or leave a text bellow that would help me so much.
#20
If anyone can help please reply. Thanks
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