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Help me out.


Chase
Member


Galant VR-4 org Post #: 983003 posted 04/07/11 11:46 PM     Remind Me!  Send Private Message   Edit Post      
This is my first DSM, and at this point Im kind of lost as to what to check next. Car idles like it has cams in the damn thing and the motor is all stock. I tried flipping the CAS and that seemed to not help at all so I put it back. It also is misfiring under rev now and the plugs are new and the coil and wires are fine. Just looking for some input on what to check next. Im attaching a video of it at idle. Keep in mind it has no exhaust right now so it sounds like hell. Thanks in advance.

click



91 Belize GVR4 ?/2000

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onesickcrx
Brother of the Year
449/2000



Galant VR-4 org Post #: 983004 posted 04/07/11 11:48 PM     Remind Me!  Send Private Message   Edit Post      
what have you changed since the last time it ran ok?



Lack of boost

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Chase
Member


Galant VR-4 org Post #: 983005 posted 04/07/11 11:53 PM     Remind Me!  Send Private Message   Edit Post      
Its been acting up since I got it. I got the car with a motor that had a spun bearing so I put a whole new running motor in the car. It doesnt have a ton done to it either. evoIII 16g on a crap tubular mani, fmic, 2g maf, the head is ported if i remember right but that shouldnt do that, 10mm wires and thats really it motor wise at the moment.



91 Belize GVR4 ?/2000

Posts: 133 | From: Naperville, IL | Member Since: 11/23/10 | IP: (68.60.233.52) | Report this post to a Moderator

desant78
Member ++
1662/2000
995/1000


Galant VR-4 org Post #: 983009 posted 04/08/11 12:09 AM     Remind Me!  Send Private Message   Edit Post      
this is a really dumb suggestion...but I have feel victim to this.

make sure the spark plugs wire are in the same place...and I DID THIS TOO. I just did not realize the previous owner, attached the coil pack in such a way it was not clear which should be the front or back. for the hell of it, i put the plugs in complete opposite order, basically backwards.

and this fixed this exact issue! so hard to start...misfiring like yours, and was very very unresponsive. good luck!



i wanna go fast.

1991 GVR4 1662/2000 (parts car)
1992 GVR4 995/1000 (JSB)
2008 Evo X GSR (DD with bolt ons, 17x,xxx miles)

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vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 983058 posted 04/08/11 08:53 AM     Remind Me!  Send Private Message   Edit Post      
Did you change the belt or check for timing?



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


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Chase
Member


Galant VR-4 org Post #: 983084 posted 04/08/11 11:32 AM     Remind Me!  Send Private Message   Edit Post      
I checked the timing on the motor before it went in. It was correct.



91 Belize GVR4 ?/2000

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ItsAliiive
Unregistered


Galant VR-4 org Post #: 983086 posted 04/08/11 11:42 AM     Remind Me!  Send Private Message   Edit Post      
Try to find someone that has a known good injector resistor pack and power transistor/igniter.

Try a boost leak test too. And like someone else said, double check that your spark plug wires are on the correct coil pack ports.

How is your ecu? OPen it up and inspect the board for cap leak.

And check wiring to cas and make sure there are no broken wires. In fact check for broken wires on every electrical part as the wiring on these cars is very old and brittle by now.

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onesickcrx
Brother of the Year
449/2000



Galant VR-4 org Post #: 983142 posted 04/08/11 02:29 PM     Remind Me!  Send Private Message   Edit Post      
Quoting Chase:

I checked the timing on the motor before it went in. It was correct.





How about with a timming light?



Lack of boost

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turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 983145 posted 04/08/11 02:37 PM     Remind Me!  Send Private Message   Edit Post      
Make sure the exhaust cam isn't retarded one tooth.



-Mark

A face only a grocery shopper could love.
1051

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NYC86ZC
30-Something
541/1000


Galant VR-4 org Post #: 983155 posted 04/08/11 02:59 PM     Remind Me!  Send Private Message   Edit Post      
You have a 2g maf, but do you have a chip or 550's?

Quoting Chase:

Its been acting up since I got it. I got the car with a motor that had a spun bearing so I put a whole new running motor in the car. It doesnt have a ton done to it either. evoIII 16g on a crap tubular mani, fmic, 2g maf, the head is ported if i remember right but that shouldnt do that, 10mm wires and thats really it motor wise at the moment.





-92 Grey #541
-05 WRX

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Chase
Member


Galant VR-4 org Post #: 983300 posted 04/08/11 10:17 PM     Remind Me!  Send Private Message   Edit Post      
ECU is not leaking, isnt an eprom either. No chip but I do have Evo 560's in it.



91 Belize GVR4 ?/2000

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vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 983367 posted 04/09/11 01:43 AM     Remind Me!  Send Private Message   Edit Post      
I could be wrong...but don't you need some sort of fuel controller?



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


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turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 983462 posted 04/09/11 05:12 PM     Remind Me!  Send Private Message   Edit Post      
560's and a 2gMaf almost cancel each other out. It will run and idle fine, but I wouldn't start stomping the throttle all over without some sort of tuning device. That is what I run in 503 and with the SAFC zeroed out it starts and runs just fine. I had to make minor adjustments for idle and cruising and some bigger adjustments to airflow/fuel at WOT.



-Mark

A face only a grocery shopper could love.
1051

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Chase
Member


Galant VR-4 org Post #: 983485 posted 04/09/11 08:14 PM     Remind Me!  Send Private Message   Edit Post      
Yea I have the AFC and its zeroed and it still acts up. I disconnected the maf signal though because it wouldnt start at all with it which is why I didnt mention it.



91 Belize GVR4 ?/2000

Posts: 133 | From: Naperville, IL | Member Since: 11/23/10 | IP: (68.60.233.52) | Report this post to a Moderator

turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 983533 posted 04/09/11 11:46 PM     Remind Me!  Send Private Message   Edit Post      
Disconnected the maf signal? Did you resplice the maf signal wire back together so that the ECU would see the signal?



-Mark

A face only a grocery shopper could love.
1051

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Chase
Member


Galant VR-4 org Post #: 983535 posted 04/10/11 12:13 AM     Remind Me!  Send Private Message   Edit Post      
yes



91 Belize GVR4 ?/2000

Posts: 133 | From: Naperville, IL | Member Since: 11/23/10 | IP: (68.60.233.52) | Report this post to a Moderator

AnotherNewb
flutterdumper


Galant VR-4 org Post #: 983543 posted 04/10/11 12:33 AM     Remind Me!  Send Private Message   Edit Post   
Quoting onesickcrx:

Quoting Chase:

I checked the timing on the motor before it went in. It was correct.





How about with a timming light?




Since you pulled the CAS it NEEDS to be adjusted with a timing light now. The simple checks would be a boost/vacuum leak test. Re-check the gap on your spark plugs and get a data logger. Once you do that, do a cylinder drop test by pulling plug wires one by one until you find the one that doesn't change the idle or doesn't kill the motor. Also a compression test or leak down test may be needed.

Did you know anything about this motor before you put it in?



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