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| TC 914-8 |
Dec 8 2011, 09:53 PM
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 840 Joined: 23-May 08 From: Sequim, WA Member No.: 9,090 Region Association: Pacific Northwest
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I just found out my wifes coworker, The Dr Vet's husband, has a 75 2.0 with a dual Weber downdraft conversion. I stopped by last weekend to take a look. it has some minor electrical issues which I should be able to sort out fairly quick with proper diagnostics. Horn, lights etc..
One of his main concerns is mis firing and sputtering during acceleration. It is a fairly clean set up bought from a guy in Bremerton back in 2000. I forgot his name but should be active on this site. so under slight acceleration, reving the engine it sputters around 2500 RPM. with no gauges or tools I noticed the F/A screws on the driverside carb were out different ratios. I gave them a slight adjustment and it seemed to help. I figure we need a air flow meter to put over each venturi and dial in each barrel evenly. (IMG:style_emoticons/default/idea.gif) Being a V-8 guy I would slap on a vaccume gauge and adj from there.... I did not see any vacume ports so its all new to me (IMG:style_emoticons/default/confused24.gif) How do you boys dial these babys in? I was also under the impression a stock FI cam is not really compatible running carbs... (IMG:style_emoticons/default/confused24.gif) Shoot me some ideas , once I get him running, I will have a new teener buddy in the neighborhood to tool around with since you Teener Tuesday boys are afraid of coming accross on the ferry (IMG:style_emoticons/default/poke.gif) |
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| Ductech |
Dec 8 2011, 10:06 PM
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#2
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Member ![]() ![]() Group: Members Posts: 356 Joined: 16-July 10 From: AridZona Member No.: 11,949 Region Association: Southwest Region |
I would start with thinking about how long this car sat. 2000 was almost 12 years ago now. If it hasn't run regularly since then most likely the fuel system is full of debris and or bad gas. as the carbs can gum up with fuel varnish from sitting and not getting good fresh fuel now and again. ...
So start with cleaning the carbs if they have not been done recently, Maybe consider cleaning out the gas tank, Then reassemble and sync the carbs, If you have a liking for tuning get a lambda sensor preferably a wideband and setup the various adjustments that way. Also look into the chance of ignition miss-setup. Verify correct timing, check your points and the gap on them. I can't help with specs on the carbs or the ignition settings. Alas i have only worked on subaru powered teeners. Good luck. And if the owner isn't on here as a member get him to and get that vin in the system |
| TC 914-8 |
Dec 8 2011, 11:52 PM
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#3
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Senior Member ![]() ![]() ![]() Group: Members Posts: 840 Joined: 23-May 08 From: Sequim, WA Member No.: 9,090 Region Association: Pacific Northwest
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I would start with thinking about how long this car sat. 2000 was almost 12 years ago now. If it hasn't run regularly since then most likely the fuel system is full of debris and or bad gas. as the carbs can gum up with fuel varnish from sitting and not getting good fresh fuel now and again. ... So start with cleaning the carbs if they have not been done recently, Maybe consider cleaning out the gas tank, Then reassemble and sync the carbs, If you have a liking for tuning get a lambda sensor preferably a wideband and setup the various adjustments that way. Also look into the chance of ignition miss-setup. Verify correct timing, check your points and the gap on them. I can't help with specs on the carbs or the ignition settings. Alas i have only worked on subaru powered teeners. Good luck. And if the owner isn't on here as a member get him to and get that vin in the system The car has been running off and on since he bought it, he has maintained the car fairly well, except letting it sleep outside in the rain. Good point on checking the points and timing. I'll start from scratch. Syncing the carbs is what I was after, did it 35+years ago in high school, its all coming back to me now. Thanks |
TC 914-8 Tuning dual Webers Dec 8 2011, 09:53 PM
Ductech Some people used old sync gauges that would go ove... Dec 8 2011, 11:59 PM
nathansnathan
Some people used old sync gauges that would go ov... Dec 9 2011, 09:40 AM
mrbubblehead i use a snail for synchronizing and an innovate ai... Dec 9 2011, 12:07 AM
jaxdream Don't forget to adjust the valves before synci... Dec 9 2011, 08:42 AM
rdauenhauer and there is the old standby...ditch the carbs ... Dec 9 2011, 09:51 AM
stownsen914 Cars that haven't been run much can obviously ... Dec 9 2011, 11:22 AM
stownsen914 Oops duplicate post Dec 9 2011, 11:25 AM
messix Have I not taught you any thing?
Go give it an I... Dec 9 2011, 11:36 AM
J P Stein There are a number of things that could be causing... Dec 9 2011, 11:50 AM
pt_700 slightly ot but, i had an old mechanic friend once... Dec 9 2011, 12:48 PM
TC 914-8 Wow, thanks guys for all the input, I like the Car... Dec 9 2011, 09:09 PM
a914622 Hey i have a snail syncer i could let you use to s... Dec 9 2011, 10:36 PM
mrbubblehead
Just a thought but i rigged a vacuum line back o... Dec 9 2011, 10:55 PM
TC 914-8
Hey i have a snail syncer i could let you use to ... Dec 10 2011, 01:05 AM![]() ![]() |
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