Took a long drive today, and had some problems |
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Took a long drive today, and had some problems |
Hammy |
Mar 11 2005, 07:38 PM
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#1
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
Took a drive up to the foothills today. I Don't know much about mechanics so I have questions (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)
Driving along the highway it seemed to be losing more and more power. The elevation change was from under 100 feet to up to around 3000 ft.. So from the little I know, it's the carbs right? The idle was really low when up high and it kept wanting to die, but when we got back down low it idled fine. Also, while driving some twisty mountain roads, suddenly my brakes go out. Push them all the way to the floor and barely anything. Shit. (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif) But when pumped 2 or 3 times they'd work. Brakes need to be bled? Or what could it be? Why would they suddenly just start acting up? It was an interesting drive home.. Help (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) |
jd74914 |
Mar 11 2005, 07:41 PM
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#2
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
(IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) i say bleed the brakes right away. like yesterday before you drive the car again |
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TheCabinetmaker |
Mar 11 2005, 07:51 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Loss of power was probably because of the altitude and attitude. Thinner air and constant uphill. Carbs tuned to sea level can have severe prob at higher elevations. Dwell can play a role here also. Check the brake fluid level. Sounds like a possible leak.
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Hammy |
Mar 11 2005, 07:53 PM
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#4
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
So..How do i learn to tune carbs (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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TheCabinetmaker |
Mar 11 2005, 07:57 PM
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#5
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I'm a fuel injection guy, but there are many carb guru's here.
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SirAndy |
Mar 11 2005, 08:00 PM
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#6
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Resident German Group: Admin Posts: 41,651 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
check for leaks. flush 'em, bleed 'em. check for leaks again, then bleed 'em one more time ... get someone to help, cause it will make the job *much* easier ... (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) Andy PS: also check the MC for leaks on both sides (behind pedal cluster and from under the car)! |
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airsix |
Mar 12 2005, 01:41 AM
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#7
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
As a general rule of thumb a piston engine* will lose about 5% power per thousand feet of elevation. Even with perfectly tuned carbs an engine will have 15% less power at 3,000 ft ASL as compared to sea level.
Add to that the fact that as you go to higher elevation a carbed engine runs richer (unless re-jetted or adjusted) and elevelation change can really affect power. *naturally aspirated (no turbo or supercharger) -Ben M. |
Andyrew |
Mar 12 2005, 01:49 AM
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#8
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Ya, turbo's do better with elevation and such... they spool more boost with the more drag on the engine, wierd.. lol
Give me a call in the morning, 529-9944, and i'll have you come over and we'll go over your car, bleed the brakes, check for potential problems, ext. Andrew |
McMark |
Mar 12 2005, 01:51 AM
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#9
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
You can't tune your carbs to work in both high and low elevations. You pick the one you'll be in the most and tune it there. If you want elevation compensation, get FI. It's built in.
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Elliot_Cannon |
Mar 12 2005, 01:52 AM
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#10
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Senior Member Group: Retired Members Posts: 1,922 Joined: 26-March 03 From: Orange County Ca Member No.: 480 Region Association: None |
Check all the brake calipers and see if you can see any leakage anyware. If the calipers are dry that means the leak is probably in the Master Cylinder. If the seals in the Master Cylinder are leaking, you might not see any fluid leaking out. It is letting air into the system. Most people will discourage you from rebuilding the master c. and I don't think it's such a great idea unless you absolutely cannot afford a new one. So, bleed the breaks. Drive the car. Check for leaks. If no leaks detected and the pedal still goes down, change the master c. Try not to skimp on brake parts. Brakes are very important to your survival.
Cheers, Elliot |
brp914 |
Mar 12 2005, 10:31 AM
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#11
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Unregistered |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) dont bother rebuilding the m.c. First, it's a PITA, second it wont last as long as a new. I tried it twice on both my teeners. On 1 it lasted a few years, but on the other only a couple days. I might add that if your brakes are ok now that they have cooled down, your brake fluid may be contaminated with water, which lowers its boiling point. That water isn't going to do your calipers any good either. Flush it all out and replace with a DOT 4 fluid.
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