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UPDATE: The problem has been fixed for good. Turns out the injectors that were installed weren't 240cc's, most likely they were 180cc's from some OBD2 application (Y7 probably).

I do know that a few nuts are missing from the manifold, but since I never smelled or heard any leak it wasn't on my priority list. Right now the car is sitting in a shop so I can't exactly run right out and try it. On that subject...all the sensors checked out ok, injector flow, pump pressure...

Suppose there was an exhaust leak infront of the oxygen sensor, say the exhaust manifold was missing a nut or two. This would send a false lean signal to the ECU and create a rich condition. It would seem to me that sooner or later the ECU wouldn't want to trim the fuel anymore to adjust for the...

Right now it's running stock OBD1 240cc injectors, their resistance is 12.6-12.5 across the board, and the timing is spot on (cam and ignition). As for data logging....the best I can do is to run a digital multimeter to w/e sensor I'm interested in. Actually speak of the devil, I was wondering...

update: Ive replaced the fuel injector wiring (very questionable MPFI swap was done) and replaced the 02 sensor...and it still does it. Out of desperation I threw a multimeter on the TPS and MAP sensor to see if they would tell me anything when it decides to bog down, and they both checked out...

It was an AC-Delco universal 4 wire that was listed for a 94 Civic EX (obd-1 d16z6). I can double check the part number and possibly order another as a warranty exchange when I go to work today (work at a parts store). *edit* I only ran without the O2 sensor on the advice of a mechanic just to...

UPDATE *insert Unsolved Mysteries theme* Shortly after this post I installed a fuel pressure test gauge and did some runs with the car. Following the FSM, the entire fuel system checked out ok. During the tests it finally threw me a CEL, and it flashed me a code 43...fuel delivery system...

Car: 91 hatch with a Z6 and OBD 1 swapped in, new distributer, fuel filter, and O2 sensor,cam and ignition timing was recently set, no CEL's. Also has O2 meter installed and fuel pump controlled by a toggle switch (long story). Problem: When I first start it and drive it around town, it's just...

nevermind Disregard this thread, turns out I misread a code 1 for a code 10. I replaced the IAT sensor and the problem is gone :D

I have a 91 EF with a D16Z6 and OBD1 swap, and so far all the issues I've had getting it to run right have been resolved, except for an odd warm up problem. With the engine cold and the ECU just reset, it'll throw a code 1 (O2 sensor), and have a rough idle. It'll start to idle around 2k, then...

It could be any one of a number of things. Have you looked at the plugs yet? Any trouble codes?

Issues solved After much confusion and wire-tracing, I discovered that the person that swapped the engine into the car had the EACV and IAT connectors switched around. I still have to set the TPS to the right idle voltage and do the timing, but other than that its running normally. Now I have...

My bad, won't happen again

Round 3: Fight! So, she's sporting a TPS now, reversed the 1 and 2 injector plugs, and made definate progress. If I try to start it with no throttle, it fires and dies right away. If i do it with just a little throttle (what I imagine would bring it to 2k rpm or so) it starts up, but I have to...

Little more info... Have you done any sort of swapping recently? OBD or MPFI conversions? Without knowing much else, it sounds like someone that did an MPFI conversion forgot to reverse the TPS wires. Off the top of my head, there will be three wires for it, one of them is red, and I believe...

This is something that you should be able to find after about 5 minutes of searching.....but here's one of the better pinout pages I've found. https://hondaswap.com/reference-materials/ecu-pinouts-28667/ :)

Has fuel now, odd spark? Ok, after rigging the fuel pump to manual control (I gave up on trying to make the relay give me power....I'm positive the relay is ok, its the wires going to and from that I'm questioning) and trying to start it, it hammers and might run for a few seconds...but it...

Tonights update Ok, so I used a service manual to check the main relay, the pump, and the wiring inbeween. The main relay checked out ok according to the service manual tests, which isn't a surprise because I tried swapping a known working relay before. The pump turned on when I sent 12 to it...

Can anyone confirm the existance of some sort of roll over or front end collision switch that would cut power to the fuel pump? A few people around here have tossed the idea around as being the culprit for no fuel (more detail on that in my other thread), but I have never heard of such a thing...

Round 2 After some work and wire checking, I discovered that I had about 4 of the distributor wires mixed up.Fixed that, and now it has great spark.......but now no fuel. Main relay is fine (swapped it with a friend that has a known working one), but it seems as though it doesn't send 12v to...