Friend with C5 has problems

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Mar 12, 2007 | 11:27 PM

smr4real

Thread Starter

Instructor

Joined: Jan 2006

Posts: 160

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From: Colorado Springs CO

Friend with C4 has problems

It won't start. He has replaced the battery and alternator, but the problem occurs quite frequently. One time (as what he has told me) is when he opens the hood and slams it shut, it'll turn over. I believe he has (or is going to) replace the starter.

I'm a 01 C5 owner and we tried troubleshooting, but to no avail.

Any and all help is welcomed.

Thanks in advance

~JR~
2001 Torch Red C5

Last edited by smr4real; Mar 13, 2007 at 12:07 PM. Reason: Title was wrong. Should have been C4 instead of C5

Mar 13, 2007 | 12:33 AM

Bill Dearborn

Tech Contributor

Joined: Oct 1999

Posts: 41,058

Likes: 9,820

From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by smr4real

Any and all help is welcomed.

Thanks in advance

~JR~
2001 Torch Red C5

One thing to think about. He could be having a problem with the antitheft system. If the contacts on the key or in the ignition lock are worn or corroded no start conditions can happen quite frequently. What makes them worse is the fact there is a time delay in the system so if you try to start the car and it doesn't start you have to wait several minutes before trying again. There is also some other antitheft system circuitry involved that could cause problems. It might be worthwhile to observe exactly what happens when he gets a no start condition.

Bill

Mar 13, 2007 | 12:53 AM

Mr. Big

Burning Brakes

Joined: May 2003

Posts: 1,058

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From: Roswell New Mexico

St. Jude Donor '07-'08

you can also be getting an intermittant grounding problem. The grounds on the C5's are horrible and the root of most electrical problems. Forum member Bill Curlee did a nice write up on how to check out the grounds. I believe it is a sticky in this forum. Read that post and it may solve your problem.

dom

Mar 13, 2007 | 05:47 PM

SilvaDragon

Racer

Joined: Dec 2001

Posts: 452

Likes: 2

From: Lynnfield MA

Quote:

Originally Posted by smr4real

Any and all help is welcomed.

Thanks in advance

~JR~
2001 Torch Red C5

Replacing the starter is actually a reasonable step. If the solenoid
is sticky, the "slam the hood" fix points in that direction.

If that doesn't solve the problem, do a search over on C4 Tech
for "VATS", in particular, bypassing VATS to see if that's the problem.
(That's the key/ignition resistance pellet thing that can get worn
down and cause no-start problems, as mentioned above).

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