Cuda 426

hey guys new to the forum and looking for help. (the usual) haha. I have a 93 del sol (obd1) and I am putting in a b18b1. everything is done and hooked up but nothing is working. I am running the stock chassis harness with a p75 ecu and a 94 integra engine harness. when I got in to fire it up I noticed that none of my dash lights came on at all when I turned the key. when I put the clutch in to start the car and turn the key to start all that kicks on it my rad fan. I cant even hear my fuel pump prime. im hoping that someone on her has some advice for me cause I am at a loss other than my ecu being fried. and I have already triedm using the harness off the z6 that was in the car. had the same problems. thank you.

Turns out I missed a ground. Now I'm having another problem, car starts and idles fine but bogs out if I step on the gas and won't rev above 3000rpm. I'm getting codes 7 (tps) which is a brand new tps. Code 21 (vtec) which is wierd cause my ecu is a p75. And code 41 which is an o2 sensor cause I don't have one. Anyone have any ideas?

stupidhard

check all your ground points and make sure you're getting voltage on the wire harness by checking with a volt meter. go over every visible inch of the engine and chassis harness to make sure you didn't cut or mangle anything inadvertently. check all main fuses and relays.

there is a process to diagnose nearly anything. start at point "A" (battery) and work your way back (ignition switch). that's a lot of ground to cover, factory service manuals (FSM) are available on line in PDF form that include wiring diagrams. even with a swap, you should be able to find all the critical points to check. download diagrams for both your car and the donor car, sit down and study, eat something, then go to work. its gotta be something simple and silly, that swap should be a drop in with no electrical puzzles to solve.

good luck.
-chris

p.s. check out the FAQ also.

Former User

Do the headlights, hazard lights, or horn work?

Start by checking the fuses, like 31, 24, and 18.

Cuda 426

Thank you for the help turns out I missed a ground. Now I'm having another problem, car starts and idles fine but bogs out if I step on the gas and won't rev above 3000rpm. I'm getting codes 7 (tps) which is a brand new tps. Code 21 (vtec) which is wierd cause my ecu is a p75. And code 41 which is an o2 sensor cause I don't have one. Anyone have any ideas?

eghatch9295

iTrader: (1)

re count the cel flashes, vtec is impossible to have thrown on a non vtec ecu

Cuda 426

I've counted the cell flashes about 18 times today. It's always the same codes.

eghatch9295

iTrader: (1)

is the ecu chipped?

Cuda 426

Yes not sure with what though. It's an older chip.

Former User

Reset the ECU to see whether all codes repeat.

Cuda 426

I did that a couple times yesterday and it keeps throwing those codes. I even took the chip out but that didn't help at all, if anything made it worse. and without the chip in it it wouldn't give me any codes, the engine light just stayed on. jumping the plug wouldn't give me cell flashes. plugged the chip back in and as soon as I hooked it up again it would flash.

Former User

Why is your P75 ECU chipped?

Have you checked for swapped sensor connectors by matching connector wire colors to each sensor?

eghatch9295

iTrader: (1)

kind of sounds like the ecu might be causing all/some of this. do you have a p06 available to you to try out?

Cuda 426

yes I went over the whole harness and there are a lot of colors that don't match up on my shock towers but the wrong colors go to the right sensors for the colors on the chassis harness. I think I am maybe having trouble because I don't have a map sensor. the colors for the tps are green, red/blue, and yellow/blue I believe? anyways, when I plug those wires into the tps the car wont start (fires and shuts off) but if I switch the plug (plug in the map sensor wires to the tps) and leave the tps wires unplugged. the car will start up and run but then it gives me the problems im having. and I think my ecu might be going into limp mode. that's why its not revving above 3000

Cuda 426

and no I don't have any extra ecu's around at all.

Former User

You have a wiring nightmare. Unplug the battery and properly sort out the wiring before you fry the wires and blow the ECU and other components.

http://www.phearable.net/information/tech-area.html

So why no MAP sensor CEL code?

You are way over your head for this project. Pay a professional.

Cuda 426

im not getting a map cel code because its plugged into my tps. only way it will run. that's why its throwing a tps code. and ive already gone over the ecu pinouts. it all checks out. and as for the chip I bought the ecu with a chip.

Former User

Wow. You need to walk away from this car and seek professional car help. All you are doing is damaging the car.

eghatch9295

iTrader: (1)

yes. op, do the following: go to the junkyard, pull a 92-95 civic non vtec engine harness, and swap that on for the hacked up one you've got. id snag a p06 while there as well. hell, i saw a couple obd-1 integras at my local yard, if you want to pay their $40 or so and whatever shipping is ill get one for you.

Cuda 426

that's the weird thing though my harness was out of a stock 94 integra and I tried a harness out of my friends 94 civic as well. im just gonna get a map sensor, plug it in and see if it works. thanks for the offer though I really appreciate the help.

78F350

The MAP sensor will not solve the issue of the VTEC (code 21). You are probably going to need a different ECU. If it is chipped for VTEC and tuned, it will not work well for a stock B18B1 with or without a good MAP sensor. Can you post a pic of your ECU with the top cover off, just so we can verify what you have?

Cuda 426

So I got a map sensor in and It runs better now but I'm having an issue below 2000rpm. It struggles to keep running and wants to die if I don't give it a bit of gas. When it does idle on its own it sits at 500rpm and sounds like a lawnmower. And I can't post pictures but I'll look at the circuit board and compare it to what it's supposed to look like. I know you can convert ecu's to vtec

Cuda 426

Oh and the car now revs just fine when it's above 2000rpm. And it only bogs below 2000rpm now