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Crank trigger plate backwards?

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Old Jul 22, 2015, 01:20 PM   #1
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Crank trigger plate backwards?

Is it possible for the crank trigger plate to be backwards. I understand it is keyed but would timing be off if it was flipped? Thanks!

For reference...http://www.streettunedmotorsports.co...gger_plate.htm
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Old Jul 22, 2015, 01:56 PM   #2
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Yes. And it will cause the car to run poorly.
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Old Jul 22, 2015, 01:56 PM   #3
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If you put it on backwards, and timed the cams to it, the crank is going to be about 60* off of top dead center because the notch for TDC is in the wrong spot. Double check this before starting your engine if you have doubt. You will likely get piston to valve contact if you attempt to start the engine...
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Old Jul 23, 2015, 10:43 PM   #4
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Thanks guys, that was the issue, not sure how i flipped it in the first place And no I didn't time it based on it being flipped, but thanks for the heads up anyways
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Old Jan 21, 2016, 06:06 PM   #5
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Ok so how is the plate supposed to be?? My car just will not turn over at all. And Im literally down to checking timing. Timing belt changed and it wont start. I checked timing before install and it was good
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Old Jan 24, 2016, 09:23 PM   #6
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Originally Posted by poonpower View Post
Ok so how is the plate supposed to be?? My car just will not turn over at all. And Im literally down to checking timing. Timing belt changed and it wont start. I checked timing before install and it was good
When I had the plate backwards it still fired and idled fine. Unless it being backwards had broke your crank position sensor, I'm not sure it being backwards would cause that.
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Old Sep 12, 2017, 09:23 AM   #7
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Bringing this back from the dead! If it's backwards will the car still run and drive? I'm having problems where I hit boost I lean out and feels like fuel cut? Also dies when I let off gas after car is completely warmed up. Could this cause this? I found my cam disruptor backwards. Already changed that.
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Old Sep 12, 2017, 09:59 AM   #8
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No, car will not run or drive if it's backwards. They usually don't run or drive if the cam one is backwards.
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Old Sep 12, 2017, 10:46 AM   #9
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Is the crank plate is in backwards it will rub against your timing belt and chances are the car wont be able to turn over without significant interference.
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Old Sep 12, 2017, 11:09 AM   #10
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Alright. So I got something else going on and have no idea what it is. Thanks guys.
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Old Sep 12, 2017, 11:25 AM   #11
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Alright. So I got something else going on and have no idea what it is. Thanks guys.
start with the basics, do a boost leak test. Who knows, maybe you have a problem and are over boosting and hitting fuel cut. Also you might have other issues that will be revealed by a boost leak test contributing to your idling problems. Next thing on my list would be spark plugs.

Getting it to idle properly would be my 1st goal, in fixing that you will probably uncover your other issue. If you can give more details and context we will probably be able to give you some more stuff to look into. Could be tune, could be mechanical/electrical etc but not enough info.
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Old Sep 12, 2017, 01:25 PM   #12
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Yeah I just didn't wanna hijack the OP. But it will start in the mornings if I give it gas. Then it'll idle just fine around 1100rpm on a ams f1 intake and 75mm boomba throttle body. I can drive to work fine just can't hit boost or it leans out. I have a new 255 main and a 450 on a hobbs around 12psi. -8an feed and -6 return. Fuel pressure is 38 on the fpr. I have duel waste gates the top hole for the wastegates is t together then goes to the left side of the 3 port. The bottoms holes t together also with the turbo port then goes to the right side of the 3 port the middle of the 3 port is a breather.

Last few days my wideband is crazy. From 12 lean 12 lean 12 lean idles lean. Also has new spark plugs and I checked the iac if it was working.

Last edited by c4s3ys; Sep 12, 2017 at 01:37 PM.
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Old Sep 12, 2017, 02:02 PM   #13
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MAF or SD?
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Old Sep 12, 2017, 02:19 PM   #14
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Sd
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Old Sep 12, 2017, 02:36 PM   #15
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Originally Posted by c4s3ys View Post
Sd
I've seen alot of people having problems with MAP sensors dying on them, I would be highly suspicious of that potential issue. If I where you I would try swapping in a known good / new one and see if that fixes it. I don't usually advocate buying stuff you might not need, but seeing how unreliable MAP sensors can be I would want a hot spare ready to go anyway.
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