2G 2gb 7 bolt no spark why?

[Javi4g63]

Alright fellow dsm'rs, let me start off by saying i bought this car in pieces 97 gst. The shell was not molesting in the cabin. only thing that was removed was the main engine harness and some relays. on other hand the bay had nothing in it except harness from the cabin and fuse box. basically everything was there except the long block and sensors. i got a 98 ecu and engine harness with complete rebuild from top to bottom .20 over pistons, factory t25 turbo. I've never drove the vehicle. i would really appreciate if any one has any type of input big or small to post so anyone with a similar issue could go down this thread to hopefully diagnosed there vehicle. so heres my problems guys my car cranks but doesn't turn over. it doesn't even try. so i started looking for fuel spark and compression. thats really confusing me because I'm getting all those but my spark weakens by the time it make it to the spark plug. I've stuck i screwdriver in the coil with a grounded wire to see if i get spark. i do! :/ some how i get a deep blue spark directly from the coil but doesn't make it to the spark plug. well sometimes its does and sometimes it doest more doesn't then it does. plus when i do the ark is weak:/ i don't know if it could be a ground, sensor or something that has to be plug in in order for the car to start. I'm saying that because all the sensors in the engine bay bolted on the fire wall are not plugged in. there vacuum sensors. posted some pic to see if you guys spot something. ill take more pics of specific locations. please any info will be much appreciated.

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[bo0st]

Does the car have Link?

Can you upload a log?

 

[Javi4g63]

i don't believe so. i just got a 98 black box ecu. i heard you can flash those so is it possibly to get a log?

 

[JFPryde]

Black boxes can log without the flashing. EVOScan is what you need to buy to do the logging, but your going to need a Tactrix openport cable if you don't have one yet. ECU Flash will be what you use to Flash and tune along with Ceddymods if you so chose.

 

[Javi4g63]

the program itself is affordable but that cable is expensive. i can't use a regular obd2 port that connects to a laptop and evo scan. ideas on any could be and might be before i purchase product.

 

[JFPryde]

I believe there is a VAGCOM FTDI cable that you maybe able to use to log, but it won't work for flashing. If your planning to use ecu flash as a tuning solution then you need the open port cable. It's still cheaper than link, but it can be difficult to learn and there's far less support For it.

All of that aside, there's only so many root causes for no spark. You need to systematically rule them out to isolate your issue. Things that come to mind are CAS or CPS, your MPI relay, or bad ecu. There are good no start threads that you should use to rule out issues.

 

[Javi4g63]

cas is spraying fuel my crank angle sensor is giving me spark. if one of them was bad i wouldn't get either right? both mph relays were replaced. they click when key is on position. and I've two ecu's black box and the metal one. black box ecu gives me code p0201 and the metal one gives me p0202. with of the picture provided above one of my connection is not plugged in ( injector resistor pack) could this possibly connect to my problem. the code means open circuit cylinder 1 p0201. code p0202 mean cylinder 2.

 

[Javi4g63]

if someone could unplug the sensor and try starting there car i really appreciate it.

 

[19Eclipse90]

Without the injector resistor pack plugged in, the injectors should not be firing, i.e., no fuel to the cylinders.

I'm confused -- if you tested for spark at the coil and it was good, but then you tested it with the plug wires installed and it was weak or non-existent, why are we looking at anything outside of plug wires at this point? Have you checked the plug wires themselves?

 

[Javi4g63]

believe me I'm puzzled to. when i turn my key to on i hear the injectors clicking. i pulled out my plugs and seen fuel on top of the cylinders. so without the resistor pack I'm still getting fuel??:/ ima double check to make sure its fuel. and for the wire there brand new ngk 10.2 mm. okay i just remembered i plug the wires in the coil, then a screw driver at the end were the spark plug goes on and got a deep arc. but with the spark plug on it weakens or no spark at all. bad plugs? there brand new.

 

[Javi4g63]

its fuel

 

[19Eclipse90]

Gap on the plugs? Tried a different set?

Doesn't make sense you're getting fuel without the injector resistor pack plugged in unless the injectors are stuck open for one reason or another. Electrically, the power for them comes through the injector resistor pack. What injectors are they?

 

[Javi4g63]

I've tried 560 pink evo injectors and 450 stock black tops. so if theres no power going to the injector but there spraying because there open. will this interfere with my spark because Its not sensing power to the injector?

 

[Javi4g63]

gap is 32 i believe

 

[19Eclipse90]

It's not preventing spark from what you're telling us. You're telling us that it has spark but it is very weak. Gap your plugs to 0.028". You've verified spark at all four cylinders? Do you have the plug wires going to the correct cylinders?

I seriously doubt all of your plugs are stuck open unless the ECU is bad, especially since you've tried different sets of injectors. But without the injector resistor box plugged in, I don't see any other explanation.

I can think of three things that would cause a injector to be stuck open. A bad injector, short in wiring to the ECU, shorted driver transistor in the ECU..

 

[Javi4g63]

That's true it is weak and sometimes it doesn't even spark. I've tried 2 different ecu and 2 set of injectors. I'll gap the plugs to 28 and start looking for the resistor pack. If anyone has one send me an offer. My wire order is 4123. 4 going to your far left facing the vehicle from the front. 1 going to my far right by cam gears

 

[Javi4g63]

vroom vroom people. resistor pack will prevent your car from starting plus gives you weak spark. case closed