It RUNS!!! But I got a CEL.
 

Might weekend has been a living hell! Here the Story and Question:

Friend came down to get a y8 put inot his 99 Hatch.

Saturday we put it in, tossed a Xenocron Conv Harness on it, A chip and a Converted p06 and 450 with resistor box, Start the motor and it's wont run, cranks, sputters like it wants to start, but not solid hits.

So We put stock injectors y8 back in, recurved for 240cc, same deal.

Next we put the p2e ecu back in, crank and it start the dies within seconds.

So I got pissed pull almost an alnighter, put the y7 back in crank and we still have nothing. All the same simptoms. Starts, idles for a sec or so at 1500rpm, the flat lines. if you give it gas it dies faster.

Tonight I re-wired the injectors straight from the ECU, nothing, Tossed 240cc OBD1 Injectors in, Idles for a sec then dies. Try a known good OBD1 ECU and disabled the IACV, and get nothing.


WHAT COULD THIS BE? The guy is driving my car this week as he live about 45min away and this thing is stil in my shop.

CLiff Notes: Car starts, idles for a sec or so then Dies. I'm pulling my hair out and want this damn thing to run.

Re: Major Problems with a y7 and a y8
 

Was it a Y7 to start with?

Re: Major Problems with a y7 and a y8
 

Dumb. reading owns me

Re: Major Problems with a y7 and a y8
 

Is the Y8 from a stick or auto? If a stick did you convert to a 2 wire IAC on the harness>?

Re: Major Problems with a y7 and a y8
 

Well, it was y7, was a stick, use the same tranny and all. He didn't get the 2 wire iacv so I disabled it in Crome which I have been sucessful with before.

But that doesn't matter. I don't care at this point if the y8 runs. The y7 is in there, stock ECU had stock injectors in and it doesn't run.

It's like as soon as it start and begins to idle, someone turnis the key off. Exacty like that.

Re: Major Problems with a y7 and a y8
 

No codes? Swap the MAP and TPS?

Re: Major Problems with a y7 and a y8
 

No Code, Check continutity from ECU to TPS and MAP, Checked Wire colors and all.

It just dawned on me now that he has quite the CompuStar Alarm, mabye it the ignition kill is doing something funny?

Re: Major Problems with a y7 and a y8
 

Also, Thanks CSAddict for the ideas. So far they aren't the solution, but I have racked my brain and 2 others for the past 2-3 days and we can't get it, We need other opinions!

Re: Major Problems with a y7 and a y8
 

what do the plugs look like?

Re: Major Problems with a y7 and a y8
 

Tried 2 sets. the one outof the y7 and the y8. Both have normal colouring.

Re: Major Problems with a y7 and a y8
 

just an idea, did you by chance switch the MAP plug with the TPS or the other way around ??

Re: Major Problems with a y7 and a y8
 

I traced the wire and check colours so I'm nearly 100% sure they are correct, but with everyone asking that, I'm trying it tonight.


PLEASE all of HMT Cross your fingers it starts tonight, I'm know he wants his car back,

On a side note, with him having my car, I get to drive the wifes fully loaded to the nines, Supercharge Mazda Millenia, It's not my built hatch I've been dying to drive, but 14psi still feels good!

Re: Major Problems with a y7 and a y8
 

I PLANNED IT THAT WAY FOR YA ;D

Re: Major Problems with a y7 and a y8
 

sorry for the caps

Re: Major Problems with a y7 and a y8
 

HaHA, Hows the Accord?

it's canuckhatch's car we are having the prob with.

Re: Major Problems with a y7 and a y8
 

not bad. i notice that when your near the bottom of the tank she really likes to bog.

Re: Major Problems with a y7 and a y8
 

Im sure you'll figure this out, it sounds like a simple, basic toubleshooting problem.
Is it a fuel problem?

Re: Major Problems with a y7 and a y8
 

Oh ya, aftermarket gas tank has a lower belly, so if fuel sloshes it bogs/stalls.

Ya, something probably easy, just been trouble shooting for 3 days with no luck stats to make you crazy and lackingof new idea. We checked that the spark plug wires were on right and proper clip to proper injector like 300 times.

Re: Major Problems with a y7 and a y8
 

This may sound stupid but do u havea n extras fuel puimop to swap out. sounds very similar to what happened to me with my y8 and someone else on these boards. Seems to me that these cars like to kill fuel pumps

Re: Major Problems with a y7 and a y8
 

Ya I have the pump from my hatch that I put a walbro in. But the rail has good pressure to it. Have't tossed a guage on it, but that could be another step.

Slowly building a list of things to try.

Re: Major Problems with a y7 and a y8
 

Keep us posted

Re: Major Problems with a y7 and a y8
 

Just started the car. Switch TPS and MAP and even though I thought I had it right I didn't.

Again it has the p2e ECU in it with 240cc injectors (are y7 190cc?) The car starts idles for 1.5sec @ 1500rpm then dies. I can restart it, get on the gass and it will hold at 3000rpm no problem, let off and it dies, If I keep it at 3000rpm it will stay for about 5-7secs, the try to kill itself. It bogs, and I can keep it alive by feathering the gas, but it sputters bad and then finally recovers but will try to die again in a few sec.

Re: Major Problems with a y7 and a y8
 

y7 injectors are 190cc

Re: Major Problems with a y7 and a y8
 

is it the battery? maybee the ground is shitty?

Re: Major Problems with a y7 and a y8
 

make sure it has gas (fill it up) and make sure you are using the correct gasket on the thottle body (if you are using the sam intake manifold on both motor)

Re: Major Problems with a y7 and a y8
 

Had a problem like this in a friend's 97 civic. We swapped in a b18b with no issues, and just ran it of an obd2 gsr ecu to get him around for a little while. He decided about a month later he wanted to turbo it, so we put his turbo on, converted down to obd1, and left the wastegate open so he could take the car to get it chipped. Well, when we went to start it, it would start up and idle a little rough for about 30 seconds or so and just die out. Had me stumped. I finally sat and watched his fuel pressure guage and watched as the key turned on it would jump up to almost 50 psi (used a fpr to adjust up a hair), then he would start the car and I would watch the gauge slowly drop to 0. Turns out, as soon as he would turn the car on, fuel pump would kick on but not turn off once it was pressurized. It would keep running continuously until you would actually start the car. Then for some strange reason the pump would just turn off. It sounds like you're having the same problem, so I would look into something along those lines. We never did get it figured out, he just popped the gsr ecu in and ended up running an afc with a msd boost timing retard. :-\

Re: Major Problems with a y7 and a y8
 

Okay but with 190cc it should still run. I've had cars idle on 450cc, like a bag of crap but idle.
Right Gaskets
Fuel pump sits at 36-38psi with ign on, 34-38 with it running and me keeping it running with throttle

but
BREAKTHOUGH

For the fun of it I disconnected the TPS, The car idles, revs up like ---- (no TPS and 240cc will do that) , but idles.

As it idle disconnect MAP, idled still but REAL Shitty, connected everything and it still idled realshitty, but that because no MAP tossed it into Limp Mode more then likely.


Waiting on the wife to come with my Multimeter to check TPS wiring.

Re: Major Problems with a y7 and a y8
 

Try swapping the map plug to the tps and the tps plug to the map...mighta got them mixed up in the confusion. Seen it done a few times with obd1 and obd2 wire harnesses where both plugs are combined into the main harness instead of seperated like the obd0's.

Re: Major Problems with a y7 and a y8
 

Already have swapped them. I thought I had them right, but I didn't, car kinda ran when I switched them, and now it runs when I disconnect the TPS.

Re: Major Problems with a y7 and a y8
 

hey man, u want a hand tommorow night?

Re: Major Problems with a y7 and a y8
 

Nah man, john and I will get it. I got tomorrow mornig off so I get some extra time to test things out.

Re: Major Problems with a y7 and a y8
 

sounds like the tps is the problem, very odd for sure but if its out of voltage it should throw a code the tps code is picky

Re: Major Problems with a y7 and a y8
 

update

Re: Major Problems with a y7 and a y8
 

It runs. TPS I think was grounding out. Re-ran the TPS output and it runs fine. I tossed the 190cc back in it, cleaned up the wire and away it runs on the p2e ECU.

I had to get it tonight. Still running it back to Canauckhatch as he called me at work and my POS winter beater Accord wont start. He was stranded at work!!


There is one problem though: CEL #3: MAP Circut Input Voltage Low

Anyone know what it means and how to fix it. We lengthend the wires for the MAP sensor, so I thought it could be like the TPS problem again, but no. Re-wiring brings me back to a non-starting car.

Re: It RUNS!!! But I got a CEL.
 

well obviously check the integrity of the extensions and make sure the wires aren't fucked. You can check the map with a hand operated vacuum pump; or just throw a hose on it and start sucking. You can measure the resistance of it, or the voltage through it. Best thing to do is to get a vacuum pump, and plot out the voltage vs. vacuum. So basically backprobe the signal reference wire, and the ground wire. Then apply 5" of vacuum, then 10 etc. Plot both on a graph, and the line should be straight.

the car should be able to run without the map, although it'll run like hammered ----.

Re: It RUNS!!! But I got a CEL.
 

Actually it runs not too shabby.

We're gonna test things out too.

Re: It RUNS!!! But I got a CEL.
 

so that means your comming to the track on fri right

Re: It RUNS!!! But I got a CEL.
 

check your wiring on code 3 map sensors almost never go bad but I have replaced 2 before

Re: It RUNS!!! But I got a CEL.
 

Ya, I have 4.98 Volts at the sensor, Not to sure the output, but as I siad when I cut the wire from the sensor output and run a wire straight from the sensor to the ECU the car doesn't even run.

Tomorrow I'm going to toss on an External Firewall Style MAP that I have about 50 lying around and see what that says.

Re: It RUNS!!! But I got a CEL.
 

hvae you checked the connections @ the ecu? maybe all this swapping ECU's and conversion harnesses loosened the MAP wire?