I'm putting my TPI back together and forgot to mark them as to wich injector the harness came off of. I see little marking on them say's something like (PD 10) and a bunch of other numbers on the other injectors procedded by PD. Can anybody tell me wich ones go to wich please?

Thanks again guys & gals

 

It doesn't matter. The injectors are fired concurrently.

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
ATI D1SC (5-psig):
12.26 @ 113.55 mph
ATI D1SC (10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

 

Thank you very much.

 

Are both sides fired at the sime time also or does it fire each bank separetly? Just curious. ~Arnold

 

Arnold,

Although each bank of injectors has their own dedicated fuse, the ground side of both banks are wired in parallel and fired by one injector control switch, which is located in and controlled by the ECM.

Willie

 

I'm not sure what year/ECM you might have, but most of the TPI systems I've been around have two fuses, two ground paths (blue wires and green wires) and two injector driver circuits (D15 and D16) to match the two driver transistors in the ECM. The injector banks are fired alternately, twice per engine cycle (every revolution of the crank). Maybe that's just on the ones I've worked around.

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Later,
Vader
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"Let the bodies hit the floor!"
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