Ok, so, I am picking up a 350 TPI from a junk yard next weekend. The engine is pulled from the car already and not really a way to tell which one.
SO, if I understand correctly I can grab a harness from any TPI car 305 or 350.
But how do I tell what ECM I need for that engine.
And was there not a MAF and a speed density set up on the TPI engines? And would those be a different harness and how would I tell what harness I need if that is the case?
SO, if I understand correctly I can grab a harness from any TPI car 305 or 350.
But how do I tell what ECM I need for that engine.
And was there not a MAF and a speed density set up on the TPI engines? And would those be a different harness and how would I tell what harness I need if that is the case?
Senior Member
when it comes to LB9/L98:
85-89 were MAF, 90-92 were MAP.
86-89 used the same ECM, 90-92 used the same ECM.
IIRC, the 89 harness removed the cold-start injector.
85-89 were MAF, 90-92 were MAP.
86-89 used the same ECM, 90-92 used the same ECM.
IIRC, the 89 harness removed the cold-start injector.
Quote:
85-89 were MAF, 90-92 were MAP.
86-89 used the same ECM, 90-92 used the same ECM.
IIRC, the 89 harness removed the cold-start injector.
thats what i needed to know. How do I ID if its MAF or MAP on the engine to be sure I pull one out of the correct year? Is the year stamped on by the 5.7?Originally Posted by Saar
when it comes to LB9/L98:85-89 were MAF, 90-92 were MAP.
86-89 used the same ECM, 90-92 used the same ECM.
IIRC, the 89 harness removed the cold-start injector.
Junior Member
It all depends on what you want to run, Maf or Map if the engine does not have a cold start injector or even if it does you can delete it. You need a harness and ecm from which ever system you choose to run. harness and ecm need to match every thing else is just a matter of changing sensors if needed, some sensors are the same for both.
Quote:
Is there an advantage to one or the other?? and is it something I could change out if I somehow did get the wrong stuff?Originally Posted by witnlyn
It all depends on what you want to run, Maf or Map if the engine does not have a cold start injector or even if it does you can delete it. You need a harness and ecm from which ever system you choose to run. harness and ecm need to match every thing else is just a matter of changing sensors if needed, some sensors are the same for both. 
Supreme Member
90-92 ECM has 3 connectors on it.
90-92 Map cars have the MAP sensor mounted on the pass side of the intake plenum.
89-92 TPI motors don't have an extra injector between injectors 3 and 5, and there will not be a cold start sensor on the front of the intake manifold with an injector style connector.
90-92 Map cars have the MAP sensor mounted on the pass side of the intake plenum.
89-92 TPI motors don't have an extra injector between injectors 3 and 5, and there will not be a cold start sensor on the front of the intake manifold with an injector style connector.
Junior Member
Quote:
they say maf is more forgiving to mods to engine than SD, but SD does not require the expensive maf sensor I went with SD because I could go with air filter mounted directly on TB for my 54 chevy and to me it was a lot easier to wire in my opion.Originally Posted by ncmail
Is there an advantage to one or the other?? and is it something I could change out if I somehow did get the wrong stuff? Quote:
ok cool and thank you all for your input. Im going to get everything saturday and will post pics and what not when I get back!Originally Posted by witnlyn
they say maf is more forgiving to mods to engine than SD, but SD does not require the expensive maf sensor I went with SD because I could go with air filter mounted directly on TB for my 54 chevy and to me it was a lot easier to wire in my opion. 
Senior Member
Those TPI motors used the 1227165 ECM. The MAP engines used a 7730 in some years if i am not mistaken (im tired). The 7730 has 3 harness connectors and the 165 has only 2.