2G 2g injectors arent firing

[DiamondStar90]

hey guys i have a 98 awd spyder i been working on and trying to get running right before i build it any further but i got my fuel going to rail and just not coming out of injectors now , i squirt fuel in the intake and it runs so i know its not timing
but i have pulled the rail with the injectors in it and lines hooked up and not one injector is squirting when i crank it

would should i look for or try?

car is running a 1g cas and crank sensor

 

[clipto]

Check with a multimeter the harness for the injectors, make sure your getting power to them. If you have voltage to one side of the injector, your ECU should ground the injector on the other side, make sure you have reconnected the ground wires between the engine and the frame,( not the battery to the frame) even add a few more grounds, it cant hurt. if the problem is not there then you are not connected to the ECU properly or the ECU is not grounded to the frame/engine. Also make sure the injectors are not clogged. Do you have any tuning devices? 1g cas huh could be culprit but sence you have spark and it run's when you pure fuel in the intake manifold not sure if that's apart of it. If you have any other injectors to test see if they squirt fuel.

 

[slo2spool]

Turbo injectors are low impedance so you should only have about 3v at the injector. Put the ground probe from your volt meter to a good chassis ground or the negative battery terminal and get a small pin to probe into the positive side of the connector for the fuel injectors. With the key on and engine not running you should see a constant 3 volts or pretty close. Fuel injectors are ground side switched by the ecu meaning they always have power coming to them but the ecu grounds them to complete the circuit. If you have good voltage going to the injectors then next on the list would be the CAS.

 

[dsmotors95]

im having this same problem..if i disconnect the harness of the two left injectors my idle doesn't drop or anything unlike if i disconnect my two right injectors the idle gets all ####ed up..i tried switching the injectors around to see if maybe there were clogged or dead but the problem stays in the 2 left injector harness..

 

[DiamondStar90]

Check with a multimeter the harness for the injectors, make sure your getting power to them. If you have voltage to one side of the injector, your ECU should ground the injector on the other side, make sure you have reconnected the ground wires between the engine and the frame,( not the battery to the frame) even add a few more grounds, it cant hurt. if the problem is not there then you are not connected to the ECU properly or the ECU is not grounded to the frame/engine. Also make sure the injectors are not clogged. Do you have any tuning devices? 1g cas huh could be culprit but sence you have spark and it run's when you pure fuel in the intake manifold not sure if that's apart of it. If you have any other injectors to test see if they squirt fuel.

i managed to get a good set of injectors from a friend and ill swap them out but defanitly chevk the voltage , doesnt the cam angle sensor control the fuel like the 1g's ? and if the cas is bad wouldnt there be no spark?? or am i wrong about this?

clip to- no its stock ecu no devices ATM

 

[clipto]

Well I know the 1g cas gives out both fuel and spark timing signals. But in the 2g's the transistor pretty much controls spark. I think the injector pins are different for the 1g then the 2g. There are 4 pins to be swapped on the ecu and they are injectors pins. So injectors sprayed order must be swapped to have the car run right. Also curious why you did swap to a 1g cas on your car it's alot more difficult to run with something like ecmlink will help out alot when doing these kinda things. Are you using a black top cas? How did you wire in the cas? I do know that the 2gb(97-99) model cas does not run an inverted fuel injector firing order like the 2ga(95-96) does. but I think the 2gb signals are the same as the 1g's. But before all that mess just try see if can get those injectors firing.

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[DiamondStar90]

clipto -I kinda want to put the stock 97-99 cas but thats how i got the car ,from johnmarines<<used name on tuners and when i bought it it didnt have the trans,or engine in it ,so im trying to sort everything out (stock) wise before i go any further with this car and i appreciate you helping me with this matter and ill check to see if he wired it in ,may just undo his wiring and bolt up the stock cas and get that done

 

[WES_393]

If the 1g CAS was wired in as Clipto showed then you shouldn't have a Crank sensor anymore. At least it shouldn't be hooked up to anything, the CAS is now also the CPS. So you shouldn't be getting spark or fuel.

Since your getting spark but no injector pulse, and you have a CPS, I would check the wiring to make sure everything is correct. Your best bet may be to just revert everything to stock, that would eliminate the 1g CAS and wiring as a problem.

Also, just to add to what Clipto said, the 95-96 does run inverted signals meaning the spark and fuel timing are reversed. The spark timing must be corrected in order for the car to run, but the fuel timing does not. It's still a good idea to correct the fuel timing, but it shouldn't cause a no-start condition.

 

[DiamondStar90]

ok so i checked the cas, i pulled it out with the car on and you can see its providing spark ,but still have no fuel and i also checked the wring as picture is shown above and its wired in corrected and i tried another cas and same results and also tried another ecu from my other car and still no good

Well I know the 1g cas gives out both fuel and spark timing signals. But in the 2g's the transistor pretty much controls spark. I think the injector pins are different for the 1g then the 2g. There are 4 pins to be swapped on the ecu and they are injectors pins. So injectors sprayed order must be swapped to have the car run right. Also curious why you did swap to a 1g cas on your car it's alot more difficult to run with something like ecmlink will help out alot when doing these kinda things. Are you using a black top cas? How did you wire in the cas? I do know that the 2gb(97-99) model cas does not run an inverted fuel injector firing order like the 2ga(95-96) does. but I think the 2gb signals are the same as the 1g's. But before all that mess just try see if can get those injectors firing.

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check my last post