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Underbody braces, turbos and more!

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PostPosted: Thu Sep 15, 2005 5:06 pm 
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i want to advance my timing a little on my 98 firefly 1.0 to see how it affects efficiency.

the sticker under the hood says the timing needs to be adjusted with the appropriate pins shorted on the "check connector".

but where is the connector? couldn't find it at a glance under the hood.

thanks,
d

and on a side topic, can anyone say what the effect would be if you turned (advanced) the distributor without shorting the connector? i tried this, and the rpm went up (indicating advanced timing), but then came back down again after a few seconds. does the ecu compensate for timing changes that are made like this?


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PostPosted: Thu Sep 15, 2005 5:41 pm 
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i found a connector on the firewall by the right-side strut tower. a small plastic "plug" - around 1x1x.5 inches - is plugged into it.

that it?

d


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PostPosted: Thu Sep 15, 2005 6:05 pm 
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[quote="geometro"]i found a connector on the firewall by the right-side strut tower. a small plastic "plug" - around 1x1x.5 inches - is plugged into it.

whoops, i meant near the LEFT strut tower. (driver's side - canadian car)


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PostPosted: Fri Sep 16, 2005 8:20 am 
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geometro wrote:
geometro wrote:
i found a connector on the firewall by the right-side strut tower. a small plastic "plug" - around 1x1x.5 inches - is plugged into it.

whoops, i meant near the LEFT strut tower. (driver's side - canadian car)


Yes, that is the connector, short the 2 lower left terminals and set the timing.

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PostPosted: Fri Sep 16, 2005 8:21 am 
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Sorry, 2 lower left terminals with the locking tab at the top.

Where is the d@mn edit button?

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Now Turbo'd

"M3 like the BMW?"
"No, like the Gillette razor."


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PostPosted: Fri Sep 16, 2005 10:34 am 
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thanks M3

only difference: this connector has 4 pins, not 6. i read in another forum that in that case i short the 2 bottom pins (locking tab at top).

attached is a pic of the identified connector, in case it will help anyone else find theirs.


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PostPosted: Fri Sep 16, 2005 10:41 am 
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geometro,

I am not sure that is the plug. What is plugged into it? Usually there is a dust cover over the plug. My connector on my 1993 was white.

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"M3 like the BMW?"
"No, like the Gillette razor."


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PostPosted: Fri Sep 16, 2005 12:10 pm 
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i can't find any connectors with a dust cover (white or otherwise).

whatever is plugged in to the end of this connector looks to be some kind of module.

maybe i'll cross-post my question into the q & a forum. might be more appropriate place to be asking about this.


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PostPosted: Fri Sep 16, 2005 12:19 pm 
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geometro wrote:
maybe i'll cross-post my question into the q & a forum. might be more appropriate place to be asking about this.


i mean the "problems and fixes" forum. yeah, we need an edit button :)

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PostPosted: Fri Sep 16, 2005 5:52 pm 
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that looks like a relay. i don't think the OBDII cars have this plug. if so please post a pic .
thanks
larry


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PostPosted: Fri Sep 16, 2005 10:23 pm 
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i thought all '96 and newer vehicles were OBDII. this car is a '98.

i'll double check the under-hood emission control sticker in the a.m.

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PostPosted: Sat Sep 17, 2005 11:34 am 
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under hood is missing 2 stickers (can tell from the square outlines of grime), but here's the sticker describing the timing adjustment.

still, i looked again and cannot find a 4- or 6-pin connector with a dust cap on it. the only connector which "dead ends" anywhere in the engine bay (i mean, doesn't connect to wires on the other side of the connector) is the one with the mystery black box shown here: <a href="http://www.teamswift.net/files/thumbs/t_timing-connector2.jpg">mystery connector</a>

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PostPosted: Mon Sep 19, 2005 8:59 am 
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Did you try looking behind the drivers side strut tower? That is where mine was located.

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M3----"M" body "3" cylinders.
Now Turbo'd

"M3 like the BMW?"
"No, like the Gillette razor."


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PostPosted: Mon Sep 19, 2005 9:28 am 
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i just dropped in the dealership, lifted the hood and asked a mechanic to point out the diagnostic connector. he opened the driver's door and pointed under the dash, by the pedals.

so, at least i'm not going crazy. there is no under-hood connector on a '98 firefly.

it's got 5 pins in it, like the diagram under the hood.

but unlike the diagram, these 5 pins aren't in a 6-pin connector body. more like a 16-pin body

i'll post a pic in a minute.

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PostPosted: Mon Sep 19, 2005 9:47 am 
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you can see the connector if you open the door, crouch and look slightly up above the area where the pedals are.

but i took the picture as if you were laying on your back on the floor mat, looking up.

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PostPosted: Mon Sep 19, 2005 9:55 am 
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That is the diagnostic connector for scanning the codes and the ECU. There is nothing to short there for setting the timing.

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M3----"M" body "3" cylinders.
Now Turbo'd

"M3 like the BMW?"
"No, like the Gillette razor."


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PostPosted: Mon Sep 19, 2005 9:59 am 
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M3 wrote:
That is the diagnostic connector for scanning the codes and the ECU. There is nothing to short there for setting the timing.


so your car had one of these under the dash and a connector under the hood for just the timing?

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PostPosted: Mon Sep 19, 2005 10:07 am 
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i should re-state what i asked when i went to the dealership:

i lifted the hood and showed the mechanic the sticker that indicates where to short the check connector to set the timing, and asked where that connector was.

he read the sticker, then showed me the connector under the dash.

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PostPosted: Mon Sep 19, 2005 10:11 am 
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I have worked for GM dealerships as a technician and I know you don't short anything on the diagnostic connector for timing.

Did you try looking behind the driver's side strut tower for the connector. It is usally by the fender.

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M3----"M" body "3" cylinders.
Now Turbo'd

"M3 like the BMW?"
"No, like the Gillette razor."


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PostPosted: Mon Sep 19, 2005 11:17 am 
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M3 wrote:
Did you try looking behind the driver's side strut tower for the connector. It is usally by the fender.


yup - there's no connector in that area. not by the strut tower, on the firewall, near the fuse/relay blocks. nada.

don't worry - i won't go shorting anything unless there's a positive I.D. on this thing.

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