Whats up guy's? I'm going to ask this here because I just finished installing my MPFI and mini-me swap. It seems like it's running really rich (smells of fuel out the exhaust), and when I attempt to rev it, it slowly revs through the RPM range with a stumble, especially in the lower RPM's.
I'm thinking it could be the timing, or the TPS possibly, but I am wondering if anyone has any suggestions I can look into tomorrow. I did the MPFI wiring the way every one reccomends, switching the TPS wires etc, however I noticed my TPS is positioned differently than most others in the fact that the connector part points down and not up.
I'm not sure if I needed to reverse the wires or what. It's confusing me, but I am wanting to hear some other suggestions so that I can work on it tomorrow with hopefully some success.

 

i know when i was messing around with some vacum lines my car was smelling of gas and most likely running rich. maybe theres some vacum lines mixed up

 

Hmmm, will check it out "Fo Sho" man. I know I wasn't quite sure where some of the vacuum ines went, but I figured just plugging them into a cacuum sorce at the IM was good enough

 

yeah check your map sensor and related equipment... thats probably what it is

 

make sure you got everything connected and the injectors wired right.

 

Sure will I'll check it out this morning. Also forgot to mention this is my D15B7 block with Z6 head. It's still OBD-0 so I'm running the 90-91 Si distributor and MPFI setup. I've been thinking maybe I've got the 2 white distributor wires crossed, or even the crank angle sensor wires for whatever reason crossed. I'll definately go back over it.
I've been wanting to get a Z6 distributor because it will fit the head perfectly, unlike this OBD0 Si distributor which basically allows 0 adjustment and only lines up with 1 bolt hole A Z6 distributor should work with an OBD-0 setup correct? It would essentially be the same as the OBD2 distributors working in an OBD-1 equipt engine.

 

2 wires crossed it wont start

 

Hmmm, well I checkjed my wiring and everything is good. This morning I started it and it fired right up. Ran perfectly and I even went for a rip down the road. But, it seems that when it gets up to operating temperature, thats when it starts stumbling, backfiring, and the throttle goes to ----.
I've unplugged the IACV/EACV (whatever) and it runs exactly the same as it does when plugged in. I get no codes or CEL's (with all sensors connected). My radiator fan is also not turning on. I'm wondering if it's a faulty coolant temp switch or something screwing with me

 

Gotta be ignition. Check your cap/rotor

 

Ok, I've determined it only happens when the engine gets hot. The radiator fan is not turning on for whatever reason. I might put it on a manual switch and see what happens. I have no hood on the car and I went for a drive (I know, I'm a hillbilly, what can I say) and the stumbling/studdering problem did not occur while I was driving. I'm thinking for some reason the increased airflow thats keeping the engine cool, is somehow preventing it from studdering and stumbling.
As soon as I got back to my driveway, and let it sit for a few minutes, the top radiator hose became real hot, and the stumbling problem started to happen again... This is really confising me I might have a dual radiator fan setup from my Integra laying around I could hook up, but I'm curious to know why it's doing this.