Robin Giesbrecht 72 Imperial
From: Tim Durrer <tdkd99@xxxxxxxxx> Reply-To: mailing-list@xxxxxxxxxxxxxxxx To: mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: Surge At Hiway Speeds Date: Fri, 6 Jul 2007 17:35:04 -0700 (PDT) Hmm,I have a surge at highway speeds also in my 73. 103,000 miles. I guess I had better get it checked out. Tim Durrer 73 Blue Sky --- Eric <gearhead@xxxxxxxxxxx> wrote: > Robin, > I had a '72 Newport that gave the same symptom. It > had about 129K on the > engine. After doing all the basics- plugs, wires, > ignition control unit (it > had the optional for '72 electronic ignition for > Newports with the optional > 440), and a carb rebuild, it still would surge at > highway speeds. > > One night my timing chain's nylon cam sprocket lost > the last bits of nylon > coated teeth that were still holding on to dear life > and let loose causing > the engine to die and requiring the timing chain set > to be replaced. > > After I installed the new chain and sprockets, I > noted the lack of the same > surge that you mentioned. That was the word I was > using to describe this > trouble. Other symptoms that went away after I > replaced the timing chain set > were long cranking times, a resistance of the choke > to come off of high > idle, a lumpy idle, and relatively poor fuel > economy.. I used to have to jab > the throttle to the floor a couple or more times to > get it off high idle > when cold but afterwards, a normal fraction of an > inch throttling took it > off high idle. These symptoms were due to poor > vacuum caused by out of time > cam / valve operation > > One way for you to check your timing chain set is to > put a timing light down > at the timing marker on the crankshaft. If it jumps > around as the engine is > idling, you have a worn nylon coated cam sprocket > and chain. Do you know if > your Imperial's cam sprocket has over 100K on it? If > so, it's pretty much a > given that it should be replaced. > > There is another test is to see how much you can > rotate the crank before the > distributor rotor starts to rotate. Someone on the > list was just mentioning > this and maybe they can give the specifics. > > My Newport ran smooth as silk after the replacment. > > Eric > 1964 Crown Coupe > _______________________________________________________________________ > From: "Robin Giesbrecht" <robings@xxxxxxxxxxx> > Subject: IML: surging at highway speed > Any ideas on a surging that is slight but getting > worse at highway speeds on > a 72 Imperial. I thought about a possible vacuum > leak which I have to check > out with a gauge but what about coil or electronic > control unit? Any > experience there? Everything else is great starts, > idles, power you really > can't say if there is any difference when you step > on it. > Robin Giesbrecht > 1972 Imperial > > > ----------------- http://www.imperialclub.com > ----------------- > This message was sent to you by the Imperial Mailing > List. Please > reply to mailing-list@xxxxxxxxxxxxxxxx and your > response will be > shared with everyone. Private messages (and > attachments) for the > Administrators should be sent to > iml.webmonster@xxxxxxxxx > To UN-SUBSCRIBE, go to > http://imperialclub.com/unsubscribe.htm > > ____________________________________________________________________________________Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out.http://answers.yahoo.com/dir/?link=list&sid=396545469 ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to iml.webmonster@xxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm
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