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Post by dbailey on Aug 17, 2017 13:08:12 GMT -5
My 73 stock 1600 recently started to slightly back fire and stumble under load at 2500 rpm in second gear and slightly in third. I drained the gas tank and installed a new fuel filter and checked the plugs, carb settings, exaust/intake adjusted, checked for any vacum leaks all seems fine the guy I got the GT from is telling me it has to be the ethanol 10% pump gas. I am heading out tommorrow to buy 10 gallons on 92 octian ethanol free gas. I am being told by the folks at Lee oil company that should fix it and run a lot better any one having this problem. The engine only has 175 miles since being rebuilt.
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Post by horen2tas on Aug 17, 2017 17:23:16 GMT -5
I go to the local airport to get gas. There's usually never a line and it's 94 octane leaded. VW's love the stuff.
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Post by cocacoladodge on Aug 20, 2017 18:07:44 GMT -5
Oh Horen2tas, tell the truth, you like being able to say it runs on Aviation fuel.. lol
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Post by cocacoladodge on Aug 20, 2017 18:09:12 GMT -5
boy I forgot how much i enjoy being on here reading the stories... I've been on the facebook site for most of my info, but you just cant beat the content here.
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Post by horen2tas on Aug 20, 2017 21:38:06 GMT -5
Oh Horen2tas, tell the truth, you like being able to say it runs on Aviation fuel.. lol Hadn't thought of it but now that you mention the idea, I'm gonna go with that! Thanks CCD! |
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lefty
New Member
Posts: 13 
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Post by lefty on Aug 23, 2017 21:45:19 GMT -5
I usually think of bad or to low grade fuel as causing detonation or preignition (knocking), but well let us know how it works out...
Also might check for a tight exhaust valve, worn distributer bushings, arcing spark plug wires etc. Also sometimes an exhaust leak will cause backfire bit that is usually on deceleration in my experience.
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Post by dbailey on Sept 8, 2017 10:22:39 GMT -5
I did get 10 gallons on the good gas and added a little liquid lead and It made a huge difference. Runs a lot better!! |
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