 Backfires on shifting, muffler has a huge hole in it, Are the two related? |
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| gollygwagen |
 Aug 20 2012, 07:41 AM
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Member  Group: Members Posts: 88 Joined: 13-August 12 From: Highlands Ranch, CO Member No.: 14,799 Region Association: None  |
I'm sorry to keep posting with silly newb posts, but I wasn't finding a clear answer. The car backfires sometimes when I shift gears and when I coast with it in gear. I think the second is likely related to the massive gaping hole in my muffler I plan to replace today, but if it wasn't I suspect that I will quickly blow a hole in the new muffler so I wanted to ask.
Car is coming together with all the stuff I replaced and next weekend I should replace all the fueling parts from the tank back and finish replacing the ignition pieces. After that it's mechanical and since it runs pretty well I'm thinking that's OK for now, just need to find the fancy oil this week. I know a local racing store carries Redline and Royal Purple products so I'll check with them today. How many quarts will I need and is the oil change interval similar to normal cars or due to it's air/oil cooled nature do you want to change it more often? You guys have been great. I drove it to work for the first time today and saw three 911's on the short 7 mile stretch of highway I drive. Normally it's only Cayenne's, so I think it's a sign I'm on the right track. |
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| kevin311 |
Aug 20 2012, 07:58 AM
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Member Group: Members Posts: 105 Joined: 22-May 10 From: Tampa Bay Area Member No.: 11,752 Region Association: None |
Sounds to me like an exhaust leak. Put that new muffler on and (IMG:style_emoticons/default/driving.gif)!!
I would bet the old one rusted through, I maybe wrong but there would have to be a major blockage in the muffler to build up enough pressure to blow a hole. |
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| gollygwagen |
Aug 20 2012, 08:04 AM
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Member Group: Members Posts: 88 Joined: 13-August 12 From: Highlands Ranch, CO Member No.: 14,799 Region Association: None |
QUOTE(kevin311 @ Aug 20 2012, 07:58 AM)  Sounds to me like an exhaust leak. Put that new muffler on and (IMG:style_emoticons/default/driving.gif)!! I would bet the old one rusted through, I maybe wrong but there would have to be a major blockage in the muffler to build up enough pressure to blow a hole. I was just going to swing by the muffler shop over lunch, but now I'm tempted to order up the Bursch unit from Pelican. Anyone have recommendations? I currently have an aftermarket one on (what's left of it) with dual exhaust and I'm thinking I would like the classic single tip look. The only downside is that I have my lift tied up with pulling the tranny out of my main car. It will probably take me a week to get that done. :-( |
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Posts in this topic
gollygwagen Backfires on shifting, muffler has a huge hole in it Aug 20 2012, 07:41 AM
jsconst I'm no expert but it sounds to me like your ti... Aug 20 2012, 08:01 AM
gollygwagen
I'm no expert but it sounds to me like your t... Aug 20 2012, 09:10 AM wingnut86 I have a brand new Bursch Muffler, I can't rem... Aug 20 2012, 09:54 AM gollygwagen
I have a brand new Bursch Muffler, I can't re... Aug 20 2012, 10:19 AM poorsche914 Different dimensions as shown in this graphic foun... Aug 20 2012, 10:58 AM The Cabinetmaker The bolt pattern on the mounting flanges are diffe... Aug 20 2012, 11:04 AM wingnut86 EDIT:
Well, answers that question.
If you look c... Aug 20 2012, 11:54 AM tim_nd You have a pretty cool looking 914, so you need to... Aug 20 2012, 12:12 PM gollygwagen
You have a pretty cool looking 914, so you need t... Aug 20 2012, 01:03 PM tim_nd
You have a pretty cool looking 914, so you need ... Aug 20 2012, 02:00 PM rhodyguy engine displacement is less a factor than your hea... Aug 22 2012, 06:35 AM |
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