sr101

Hey guys just rebuilt my motor, buttoned everything up cranked it over but it wouldnt fire so i first checked for spark i have bhr coils so i didnt think too much could go wrong there and every coil seemed to have adequate spark. Then checked fuel pressure, gas shot about 5 feet in the air so thats fine, then finally checked compression, sounds stronger than before when i crank it and theres lots of suction when i put my hand over the intake. So im thinking now theres a timing issue but that all is done by the gear on the eccentric shaft correct? And it doesnt look like i could have reversed it. Any suggestions appreciated

dannobre

iTrader: (3)

Fouled plugs...flooded?

sr101

Ya ive done the entire deflood procedure about 4 times, pulling out each plug and disconnecting the eshaft sensor. Even went as far as having it towed down the street in attempt of bump starting it...nothing

dannobre

iTrader: (3)

Are the ECU connectors plugged in properly? Sounds like no injectors??

dannobre

iTrader: (3)

Fuse?

sr101

Definitely getting its fuel, when i pull the spark plugs out they are soaked, the secondary injector harness plugs are easy to mix up so i even pulled that all apart to make sure theyre in the right spot. Keep the ideas coming!

dannobre

iTrader: (3)

How far did you pull it? Still sounds flooded. ECU and injectors all stock?

Phish806

iTrader: (4)

This same exact thing happened to me. I had to pull start the car to get it to start. It pull started and fired up after a few tries. Long story on what happened after that and i hope thats not yoru issue. Your next step is pull starting the car. If it does not start, we will go from there but it will also tell us alot more if it does not fire up when pulled.

Phish806

iTrader: (4)

i really hope this is not your issue. But you can check it rather easy. Check the plate on the e shaft that the eshaft sensor gets its reading from. Look and see if it is wobbleing. THis thread might help you. Start on Page 10. post 245. There is a video down the page of what you dont want to see.

https://www.rx8club.com/series-i-trouble-shooting-95/new-motor-installed-wont-start-202266/page10/

sr101

Well with those odds of 3 in 400 ofcourse it would happen to me! Ive got pretty significant wobble atleast 1/4 inch, didnt get a chance to read thru all your posts but you just fixed it in the car and jacked up the car as high as it could go to try and get gravity on your side right? I dont think i would have ever figured out that being my issue thanks a million phish!

Phish806

iTrader: (4)

whoa whoa whoa... there is alot involved in getting this fixed. i would start by just takeing off the pully and plate and make sure that there is nothing interfereing with or a piece of dirt or anything behind the plate causing it to wobble. If everything outside the motor looks good, then there is an internal problem with the front stack that needs to be replaced which means parts and taking off the front cover of the motor.

sr101

Pulled it off and there is a little bit of rust scale that i overlooked i also had the belt super tight which im sure isnt helping things, fingers crossed lol

Phish806

iTrader: (4)

Let me know how it turns out. Also check the plate, it could be bent.

Phish806

iTrader: (4)

any progress?

EricMeyer

Woaaahhhh. Wobbling at the crank sensor is an optical illusion and would have nothing to do with not starting. As mentioned a few times above, pull starting will tell you if the car will start.

A few possible things to look at more closely:

-Pull the plugs and look for too much assembly lube. Too much will clog the plugs and she won't fire.
-Fuses, ground wires and electricals that are not connected. This includes unplugging, looking inside the connectors, cleaning them and then reassembly
-Code checks. There are so many stupid things that cause these engines to shut down it's stupid.
-Lastly, if she doesn't sound the same when start cranking throughout all the lobe sounds then you probably have a build error. These things don't like to start when an apex or side seal is not functioning properly. You may get her to start and run at higher rpm by push/pull starting but if she doesn't idle then check the compression. You'll quickly see if there is a pulse issue and then you'll (sigh) have to tear here apart to find the culprit.

Good luck!

Phish806

iTrader: (4)

A few pics of the damage that was causing my "optical Illusion" Sure glad this would have no effect on how my car would start... only my mind tricking myself into thinking something was wrong.














To verify that its not an optical illusion, measure it with a tape measure while slowly turning the engine by hand. Watch what the plate is measuring while your turning the motor.

sr101

I got my car on stands at my parents place so i only got access to it on weekends so ill do the measurement then, im thinking this may be a combination of issues...when i turn the key on im getting a good amount of feedback thru the rear speakers so theres definitely a ground fault somewhere also something i forgot to mention, when im cranking it over the CEL flashes 4 maybe 5 times on long cranks

Phish806

iTrader: (4)

I would check all of your wiring connections then also. Measuring the plate is easy enough and only takes a minute. Will tell you alot. Do you have anyway to scan for codes? If so the code its throwing would be able to tell you alot.

sr101

So i went to measure the plate and noticed quite a bit of end play like 1/4 to 3/8" lol, so pulled it all apart an yup needle bearing fell off its seat. Thankfully the only damage was to the spacer ring

Phish806

iTrader: (4)

Good. glad you found the issue before it was to late. I had alot more damage before i found my issue.

sr101

Put it all back together today cranked it over and still couldnt get it to start:@ this time atleast theres absolutely no crank wabble, so i hooked it up to a tow vehicle once again dropped it in second going down the street and it does sound like its running somewhat, i can step on the gas and almost like theres 10hp i can eventually catch up to the tow vehicle but as soon as i let in the clutch again dies out right away. Stuped i hooked up my code scanner and get p0335 and p2070 both i dont think are too significant cause i forgot to reset the ess after i deflodded it for the 50th time and i havent put in any coolant yet...one other thing i can say is while towed i can push the clutch in and out for a sec and i get quite a few backfires. Lost and confused here lol

dannobre

iTrader: (3)

Why would you try and start it with no coolant?

Go back over the wiring harnesses and make sure you have it hooked up correctly

Check the gas line to make sure it is hooked up properly.....red one goes to the line close to the firewall

Check everything and give it another go

MazdaManiac

iTrader: (3)

Whoa! Painfully BAD advice. Please back away from the keyboard.

Many of us have made this mistake at some point, myself included.

It is difficult to correct this with the motor in the car, but it can be done.

MazdaManiac

iTrader: (3)

It is likely that the OP has either the coil connections out of sequence (or the plug wires) or the injectors harness miswired.

sr101

I had thought that too, i went over the injector harness twice and came up with nothing (i had each harness plug labelled aswell when i pulled the motor) Rechecked endplay at 0.0022. The only other thing that i can say is weird is with ignition on im getting a constant noise from the throttle position sensor