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Guest Message by DevFuse
 

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EJ25d backfiring after reseal. gaaahhh


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7 replies to this topic

#1 Numbchux

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Posted 09 February 2013 - 02:33 PM

99 Outback SUS that I've posted about before. Bought it a couple weeks ago. Crank pulley had backed out, lots of oil everywhere. But it ran. Pulled it out, did a mild reseal (pulled the valve covers off to find the heads have been recently hot tanked, so we didn't do head gaskets).

The crank snout was so screwed up, we ruined the tone ring on the sprocket getting it off. A friend had a brand new one he bought for a 01 RS, so we used that.

We just put everything together, and went to start it up, and it cranks a few times, catches, then backfires through the intake, puff of exhaust out of the airbox and everything.

I'm 99.9% sure we got the timing right with the new belt. Everything appears to be hooked up. Any ideas? is there a chance that the tone ring on this sprocket is slightly different?

#2 Numbchux

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Posted 09 February 2013 - 02:41 PM

code reader says the engine is turning 25 rpm.....


tried unplugging the crank sensor, no change....

#3 Fairtax4me

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Posted 09 February 2013 - 02:46 PM

There are only two types of crank sprockets. One has 6 reluctor teeth, the other has like 30.
You used the dot on the back of the sprocket for timing right? Not the arrow on the front.
Cams could be out as well. Are you sure you put the sprockets back on the correct cams?

Edited by Fairtax4me, 09 February 2013 - 02:48 PM.


#4 Numbchux

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Posted 09 February 2013 - 02:58 PM

didn't have the cam pulleys off...

yep, used the correct marks. but we're double checking now

#5 Numbchux

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Posted 09 February 2013 - 03:37 PM

ummm..... yea. 0.1%....


timing was off. reassembling now

#6 MilesFox

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Posted 09 February 2013 - 05:01 PM

COuld the spark plug wires be backwards?



#7 Numbchux

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Posted 09 February 2013 - 06:20 PM

COuld the spark plug wires be backwards?

 

We checked that...

 

It was the timing belt. Must have lined up without the slack taken up or something. All 4 cams in sync with each other, one tooth off at the crank sprocket.

 

 

 

 

After a little shenanigans to get the coolant system bled....it runs great. Was supposed to be a fix n flip.....might keep it....



#8 MilesFox

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Posted 09 February 2013 - 06:39 PM

Yeah, go for it. It always seems the one you sold is the one you should have kept. Good luck with the rest of it.






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