New motor, no spark in cylinders 2 and 3

[420a-t]

I got everything together today on my new motor, and I started it up. I'm happy that it started, but it doesnt want to idle, and its very, very rough.

Before, it wasnt wanting to start at all. I checked everything and I found that my CPS was on backwards. So I fixed that, and now it only starts on cylinders 1and 4.

Here's a little list of what I checked:

swapped coil, swapped power transistor, swapped CAS for a new one, rotated the CAS 180 degrees, checked the coil is connected to the power transistor, checked the CAS out (had a ground and 12+volts fine, but when I checked the signal side of it, it had 3.8 volts, is this correct?).

The only problem I can see is with the engine speed detection connector. I was reading on the "engine speed detection connector" and I checked that, the problem I see with that is that it should be going from the coil wire (blue/red wire), and goes to a blue connector thats by the intake manifold. From there, the wire switches to a black/white wire and goes to the power transistor. What does is do form there?

By that engine speed detection connector, there is a black/blue wire just sitting there, should it be connected to that too? What does that go to? I dont think it was ever hooked up to anything. I aslo noticed that that person who had my car before me had the fuel pump rewired to that connector too, either for the 12+volts or for the accy. does that have anything to do with it? When I undo that wire from the pump relay to the engine speed detedtion connector, the pump still works fine, but then I get absolutely no spark, not even on two cylinders.

What do I do now? I'd really like to take a drive with my new motor, but on all 4 cylinders too.

Thanks for any and all help,

Josh

 

[talontd92tsi]

I would suspect the coil, or the wiring to the coil, plugs 2 and 3 run off the same one. I would check the wiring for that coil if it were me.

 

[420a-t]

I've checked all the wires, and even replaced the coil with a known working one. I'm at a loss, and wouldnteally like to drive my money pit sometime this year .

 

[jeremy19984g63]

The crank sensor tells the engine when to fire. I bet you damaged it when it was installed backward and tryed to start it.

 

[luv2rallye]

Recheck your PT to coil wiring.

PT pin 1 is a blue/black which should go only to coil pin 1 (for cyl 2,3).

PT pin 8 is a black/white which goes to the engine speed detection connector (1 pin connector) and from there changes to a blue/red which goes to coil pin 2 (for cyl 1,4). There should be NO other wires on this!!! The 1g had a connector here which was a fuel pump (FP) check connector (on FP relay to FP) but on the 2g the connector at this location is the engine speed detection connector. The 2g (95-98) also has a FP check connector in that general area with a black/blue wire. Sounds like someone may them mixed up.

 

[420a-t]

Sound good, I'll check that. Would a bad crank sensor cause two cylinders spark go out, but the other two work fine?

 

[luv2rallye]

No but a bad CAS, PT, wiring, or ECU might.

 

[KelTsi90]

Check the power transistor plug. Sometimes the pins get loose inside and don't make contact.

 

[420a-t]

Thanks for all the help guys. I've already replaced the PT, and CAS with new ones, so I think Im down to the wiring or the ECU. I don't think it would be the ECU because I never touched the ECU, just the wiring when putting in my new motor.

I'm going to work on it tomorrow and try and get this started right. Thanks,

Josh


EDIT:

Figured it out, and the car purrs like a kitten on all 4's. 280's and a 2.3 sounds awesome!

I cut one of my wires underneath my steering wheel when I took out my meth kit while my motor wasn't in the car. I cut the black and white wire and forgot to hook it up.

It sucks it was something small, but I'm glad it wasnt something big and I learned a lot on the way .

Thanks for all the help guys.

-Josh