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jm480sx

1uz vvti

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I bought a g4 storm new in box from a local distributor in MD over the summer and have been having some issues getting a first start on it. To start with I loaded the 1uz VVTI base maps i found in the file, but was informed those may be the wrong maps to use. Claiming the maps in the file are for a 1uz VVTI 'Extreme'? and wouldnt work for your standard 1uz. Can someone confirm if that is a good place to start? 

1995 S chassis

1998 1uz VVTI

G4 Storm

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That should be a reasonable starting point.  The main change you will have to make is change the injection mode to multigroup and change the ignition mode to wasted spark since the Storm only has 4 ign/inj outputs.

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Thanks for your reply Adam, 
I switched those settings this evening and got some promising pops from the engine before my battery died. I hate to be the new guy that doesnt have a clue, but I have few precious outside sources of information.

My injectors are marked even on the passenger side 2-4-6-8 and odd on the drivers side. I am not exactly sure how the wiring guy correlated this to the outputs, but it wouldnt be difficult to figure out. Edit, my wiring guy sent me this picture: 

So how would one designate how/when/what group to fire at which point? Im assuming its a relationship with the trigger location and maybe the firing order? I hope the question makes sense and I appreciate your quick response.

48355356_611454619289583_8952736771620208640_n.jpg

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18 hours ago, jm480sx said:

So how would one designate how/when/what group to fire at which point? Im assuming its a relationship with the trigger location and maybe the firing order? I hope the question makes sense and I appreciate your quick response.

You dont have any control of the injector timing with multi-group injection.  The ECU will just fire odd numbered drives, then even drives alternatively.  It probably would be nice to swap the inj 2 & 3 wires at the ecu plug so that you dont have all the injectors in one rail all open/close at the same time.  Set the injection rate to 1/2 engine cycle and that will smooth out the pulsations too.

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Adam, why would I not be seeing any engine speed change during cranking? I am using the 1uz vvti base maps now, so that should automatically include the tooth count specs and settings for the trigger wheels right? I think the cam trigger is 5-2 and the crank is 36-2.  The only thing I am thinking I should have to setup on the trigger side of things is the offset or base timing. Can you confirm?

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Got it running this evening. Started to adjust the master fuel and it cleaned up and ran very well. I got a little carried away and reved it a few times and noticed some sparks coming out of the exhaust manifolds. Hoping this is just carbon? Quite a ways to go, but its nice to hear it run, and here is to hoping I didnt do any irrevocable damage.

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