Looking at a c5
Thread Starter
6th Gear
Joined: Feb 2019
Posts: 6
Likes: 0
Looking at a c5
Hello all,
i looked at at an 01’ c5 today, there are a lot of things I liked about the car, but a few things made me question it....
The first this is the car car starts and runs ok, but when I shut it off, it acts like it wants to diesel. It also smells like it’s running rich.
The second is that it doesn’t return to idle quickly, when you lift, it’s like it goes 1.5k, than back to idle. It also feels like it’s ldleung rougher than it should.
Does this sound normal? It’s not tossing any cel.
Cheers,
Reed
i looked at at an 01’ c5 today, there are a lot of things I liked about the car, but a few things made me question it....
The first this is the car car starts and runs ok, but when I shut it off, it acts like it wants to diesel. It also smells like it’s running rich.
The second is that it doesn’t return to idle quickly, when you lift, it’s like it goes 1.5k, than back to idle. It also feels like it’s ldleung rougher than it should.
Does this sound normal? It’s not tossing any cel.
Cheers,
Reed
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
Rough idle could be a loose connection between the air filter and intake manifold. Unmetered air can cause that.
Is the car a manual or automatic? If manual, did you have the clutch pedal depressed on shutdown? If not, they make a strange sound during shutdown. It has to do with the clutch being up front and the tranny in the rear.
Does the car still have the catalytic converters? Could account for the fuel smell.
I don't recall the issue with the hanging idle. Someone will likely chime in.
Is the car a manual or automatic? If manual, did you have the clutch pedal depressed on shutdown? If not, they make a strange sound during shutdown. It has to do with the clutch being up front and the tranny in the rear.
Does the car still have the catalytic converters? Could account for the fuel smell.
I don't recall the issue with the hanging idle. Someone will likely chime in.
Thread Starter
6th Gear
Joined: Feb 2019
Posts: 6
Likes: 0
Thanks for the reply.
Its a manual trans car.
The issue that I had with the car was not so much a noise, but when I shut it off, the engine acts like it wants to keep running. Almost like a 70s v8 when you **** it down.
It it doesn’t have have cat pipes, so that explains the rich fuel smell.
Its a manual trans car.
The issue that I had with the car was not so much a noise, but when I shut it off, the engine acts like it wants to keep running. Almost like a 70s v8 when you **** it down.
It it doesn’t have have cat pipes, so that explains the rich fuel smell.
Thread Starter
6th Gear
Joined: Feb 2019
Posts: 6
Likes: 0
No emissions anymore here in Washington.
Could bad injectors be causing the shut down issue? It’s been sitting for awhile.
the car has some issues, but someone put a bunch of money into the suspension and breaks, exhaust, and over all it’s pretty clean.
My biggest fear is that it’s got low compression on a cylinder.
Could bad injectors be causing the shut down issue? It’s been sitting for awhile.
the car has some issues, but someone put a bunch of money into the suspension and breaks, exhaust, and over all it’s pretty clean.
My biggest fear is that it’s got low compression on a cylinder.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Sounds like someone built it to run hard, ran into a problem and dumped it imo. Or someone who worked on it shouldnt have been.
There is no reason why it should ever sound like its dieseling, not normal. Lots of these for sale no need to settle
There is no reason why it should ever sound like its dieseling, not normal. Lots of these for sale no need to settle
Drifting
Joined: Jul 2015
Posts: 1,844
Likes: 375
From: San Jose, CA
I would tend to agree. If you buy someone else's project - either buy one that works well or buy one real cheap. Dieseling after shutdown is so far out of my wheelhouse that I wouldn't look twice.
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Verdad Gallardo
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,595
Likes: 4,055
From: Cape Coral, Florida
Running rich combined with the dieseling would make me think you have a leaky injector or injectors...with a low compression cylinder if you can get a cylinder leak down check you can figure out if it’s a lower or upper end issue..if you can’t get it for a REAL good price I’d pass !!
Thread Starter
6th Gear
Joined: Feb 2019
Posts: 6
Likes: 0
Thanks for all the replies.
i think I’m going to pass on this car. If I was a bit more knowledgeable about ls engines, I’d feel more comfortable, but I just don’t know enough to make a good call. The issues it has combined with the miles (148k) makes me nervous.
i made an offer of $8k, but they would only come down to $8.4, they are asking $10.9k. Honestly, I feel like $8k was a stretch, and I’m sorta glad they turned me down
i think I’m going to pass on this car. If I was a bit more knowledgeable about ls engines, I’d feel more comfortable, but I just don’t know enough to make a good call. The issues it has combined with the miles (148k) makes me nervous.
i made an offer of $8k, but they would only come down to $8.4, they are asking $10.9k. Honestly, I feel like $8k was a stretch, and I’m sorta glad they turned me down
Instructor
Joined: Nov 2008
Posts: 147
Likes: 8
From: Nashville, TN
Thanks for all the replies.
i think I’m going to pass on this car. If I was a bit more knowledgeable about ls engines, I’d feel more comfortable, but I just don’t know enough to make a good call. The issues it has combined with the miles (148k) makes me nervous.
i made an offer of $8k, but they would only come down to $8.4, they are asking $10.9k. Honestly, I feel like $8k was a stretch, and I’m sorta glad they turned me down
i think I’m going to pass on this car. If I was a bit more knowledgeable about ls engines, I’d feel more comfortable, but I just don’t know enough to make a good call. The issues it has combined with the miles (148k) makes me nervous.
i made an offer of $8k, but they would only come down to $8.4, they are asking $10.9k. Honestly, I feel like $8k was a stretch, and I’m sorta glad they turned me down
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
Mileage isn't as big a concern as upkeep. If the car is well maintained, it has a good chance of a long life. There are plenty of examples of C5s with more than 200k miles and still going strong.