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94 hatch/lsv - back fire

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Old Feb 9, 2014 | 07:18 AM
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Default 94 hatch/lsv - back fire

Ok guys I could really use y'all help on this. Just bought an eg hatch it's lsv. Engine light is on. I've tried the paper clip trick and it didn't work. Here is what the car is doing. Cranks up fine and idles fine. If I gradually accelerate. It seems to hit a fast high rev limiter at about 3500rpm as if to be in limo mode. If I accelerate quicker it back fires pretty good and not wanna pick up speed until I let off accelerater and gradually accelerate. Any idea of what this could be. Thanks in advance
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Old Feb 9, 2014 | 07:22 AM
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Default Re: 94 hatch back fire

Originally Posted by Yomama182691
Engine light is on. I've tried the paper clip trick and it didn't work.
Sort this^ out before you do anything else. Either you did the service connector jump wrong, one of the service connector wires is bad, or the ECU is bad.

What ECU?
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Old Feb 9, 2014 | 07:34 AM
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Not sure what ecu. Where would I see what ecu it is. And did it right. Tried using paper clip and tried using a wire to jump it. And just kinda visually inspected the connector and wires for damage or loose connection didn't see anything wrong. Someone was telling me if the ecu is chipped the paper clip trick might not work.
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Old Feb 9, 2014 | 07:57 AM
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Default Re: 94 hatch/lsv - back fire

Remove the passenger kick panel - post pictures of the ECU label and the service connector showing its 2 wire colors.
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Old Feb 9, 2014 | 08:06 AM
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Default Re: 94 hatch/lsv - back fire

There's a passenger kick panel on 92-95 Civics?
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Old Feb 9, 2014 | 08:11 AM
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Ok I will do so a little later today. At work at the moment.
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Old Feb 9, 2014 | 08:12 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by Dekorum
There's a passenger kick panel on 92-95 Civics?
Hmmm...so based on your comment, I guess there is no kick panel for 5th gen Civics. What covers the ECU? So just pull the carpet back?

96-00 Civic kick panel:
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Old Feb 9, 2014 | 08:15 AM
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Default Re: 94 hatch/lsv - back fire

That is the case on mine, I just pull back the carpet. But now I am actually wondering if I am missing my kick panel.
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Old Feb 9, 2014 | 08:18 AM
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Default Re: 94 hatch/lsv - back fire

See diagram for 6th gen Civic I posted above. No have?

Do you remove the door sill molding? ECU only covered by carpet for 5th gen Civic?


5th gen Civic:
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Old Feb 9, 2014 | 08:37 AM
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Default Re: 94 hatch/lsv - back fire

My 5th gens only have carpet covering the ECU and service connector wiring harness. Both being Hatchbacks.
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Old Feb 9, 2014 | 08:38 AM
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I know mine is only tucked under carpet.
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Old Feb 9, 2014 | 08:41 AM
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Default Re: 94 hatch/lsv - back fire

Very good. From here on out, I'll limit my mention of the kick panel to 6th gen Civics.

Must you remove the door sill molding to access or expose the ECU of 5th gen Civics? The OP needs to expose the ECU to photograph the ECU label.
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Old Feb 9, 2014 | 08:44 AM
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I revealed the ecu last night when I was home. It's just under the carpet on the passenger side. But I didn't know how to tell what ecu it is.
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Old Feb 9, 2014 | 08:46 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by Yomama182691
I know mine is only tucked under carpet.
On the side of the ECU should be a label with the ECU number i.e. P06-####

Name:  stockP28-ECU-lrg.gif
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In the image that is a P28 ECU. The middle number is the ECU model number.

I think Ron had asked for your ECU model so he knows what he's dealing with.

Might also need you to open the ECU up to see if it is chipped. Means taking the bottom bracket off, then unbolting the ECU so you can unscrew the cover.

I believe it's the bottom right of the circuit board that has an empty Integrated Circuit (IC) spot if it's not chipped. A proper chipping has what's called a zif socket installed so you can pop IC chips in and out at will.

The spot is above a resistor bank, in particular R17 and R18. If you have a chip directly above this resistor bank then your ECU is chipped.
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Old Feb 9, 2014 | 08:46 AM
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Default Re: 94 hatch/lsv - back fire

TomCat beat me to it.

The ECU should have a white paper label affixed to it. Photograph the label.

Example:
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Old Feb 9, 2014 | 08:52 AM
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Ok thanks guys. I'll see if I can get someone to run over to my house and get a pic of it.
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Old Feb 9, 2014 | 08:54 AM
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Default Re: 94 hatch/lsv - back fire

Love the edit button, quick fixerups on the fly. :D
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Old Feb 9, 2014 | 08:55 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by Yomama182691
Ok thanks guys. I'll see if I can get someone to run over to my house and get a pic of it.
A picture of your service connector would also help to ensure that you jumped the correct connector. For example, you don't want to jump the nearby 3P connector.
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Old Feb 9, 2014 | 08:56 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by TomCat39
Love the edit button, quick fixerups on the fly. :D
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Old Feb 9, 2014 | 08:57 AM
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No I jumper the two prong connector. I did see the three prong but knew nothing about it so I didn't touch it. Only the two prong.
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Old Feb 9, 2014 | 08:57 AM
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Could the ecu be causing the car to run like tht?
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Old Feb 9, 2014 | 08:59 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by Yomama182691
No I jumper the two prong connector. I did see the three prong but knew nothing about it so I didn't touch it. Only the two prong.
The picture could verify the wire colors.

Originally Posted by Yomama182691
Could the ecu be causing the car to run like tht?
Yes
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Old Feb 9, 2014 | 09:00 AM
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Ok thank for all the help. I'm trying to get someone to my house for pictures.
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Old Feb 9, 2014 | 09:27 AM
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Default Re: 94 hatch/lsv - back fire

Originally Posted by Yomama182691
Ok thank for all the help. I'm trying to get someone to my house for pictures.
We'll still be here tomorrow and the next day and the next.... You don't have to rush unless your schedule doesn't permit extra time for this.

Just want you to know we aren't going anywhere and will still be here when you are ready.
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Old Feb 9, 2014 | 09:28 AM
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This is a pic of the connector
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