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 Post subject: Re: Rebuilding the 95
PostPosted: Mon May 21, 2012 11:28 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
I finally figured out what was going on with the rich running! Turns out the vent solonoid next to the vapor canister is plugged when the ecm turns it on. This starts a pressure surge in the tank which eventually shuts off the return fuel line and then dead heads the fuel pump. I had 75 pounds of fuel pressure after 5 minutes of driving!! If you leave the vacuum switch unplugged everything works great! Felt so nice driving it home tonight with no hesitation or jerks when you roll on and off the gas. :buzz: :mrgreen:

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Wed May 23, 2012 8:46 am 
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Joined: Tue Oct 24, 2006 3:09 pm
Posts: 4998
Location: Palm Springs: Too hot from June to Oct.!
That is a fine piece of investigative journalism.

The smog techs in your area deserve a round of applause.

If you fix it, what would happen?

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DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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 Post subject: Re: Rebuilding the 95
PostPosted: Wed May 23, 2012 10:20 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
I guess I could do a little more digging and see what's actually wrong with the solonoid? Maybe replace it. I just filled it up today. Hopefully the gauge comes down a lot slower than it has been.

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Thu May 24, 2012 9:53 am 
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Joined: Tue Oct 24, 2006 3:09 pm
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Location: Palm Springs: Too hot from June to Oct.!
Once you do, you will probably be smarter than 90% of the people in your area who have no clue as to why it should be fixed, eh?
I'm thinking it will cost less than $20.

_________________
DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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 Post subject: Re: Rebuilding the 95
PostPosted: Thu May 24, 2012 9:38 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
I've been reading in my FSM and there is a rather complex setup having to do with this valve and the vapor canister. The joke may be on me, the more I read about it the more I'm thinking maybe my gas cap is the problem? By unplugging the VSV I'm keeping the tank from receiving engine vacuum when the ECM turns it on. If my cap isn't venting the excess vacuum it must be what seals off my return line. I'll grab a new cap and plug the valve back in and see what happens?

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Fri May 25, 2012 2:46 am 
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Joined: Tue Oct 24, 2006 3:09 pm
Posts: 4998
Location: Palm Springs: Too hot from June to Oct.!
Believe it or not, testing the gas cap is a part of the California emissions test, and gas caps fail all the time.

_________________
DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


Top
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 Post subject: Re: Rebuilding the 95
PostPosted: Fri May 25, 2012 5:07 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
I live outside the testing area up here or they probably would have checked mine by now. I got the new cap, now just to drive it home and see if it still runs good? :?

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Fri May 25, 2012 7:45 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
Well, it made it home ok so maybe the cap was the whole thing all along... :blackeye:

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Fri May 25, 2012 10:33 pm 
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Joined: Tue Oct 24, 2006 3:09 pm
Posts: 4998
Location: Palm Springs: Too hot from June to Oct.!
You have just joined the 10% in your neighborhood who understand the value of an emissions test program.
Congratulations on finding the problem.
Sometimes the easiest fix is the cheapest one.

Happy motoring!

_________________
DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


Top
 Profile  
 
 Post subject: Re: Rebuilding the 95
PostPosted: Thu May 31, 2012 11:33 pm 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
Well, I still have an issue. The gas cap only got me up from 28 to 33 mpg... I'm still noticing a pause in the throttle at 1/2 pedal so I think the fuel pump is still spiking up. I tried unplugging the VSV again and we'll see what that does for the mileage on the next tank. :?

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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 Post subject: Re: Rebuilding the 95
PostPosted: Fri Jun 22, 2012 11:26 am 
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Joined: Sun Mar 14, 2004 12:49 pm
Posts: 189
Location: Monroe, WA
Gas mileage has now jumped up to 38.5 so it's getting better. Might be time to try a new O2 sensor.

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Malcolm

'95 Metro 1.0 / 5 spd
165,000 miles


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