Maybe Undercaraige problem....PLEASE HELP
Thread Starter
Intermediate
Joined: Jan 2007
Posts: 27
Likes: 0
From: Laurel Maryland
Maybe Undercaraige problem....PLEASE HELP
Was wondering any one could help out.
I have a 96" LT-4..
I was stopped at a light and whne i started to drive it was a huge dip in the raod and was impossible to avoid it. I drove over it at about 2-3 mph. It sounded like the car bottomed out. it was a loud bang type noise. Ever scince that day it started making a ticking noise from 2,000-5,000 Rpms, in all gears. I Checked the oil and all my fluids and they were all fine.about three weeks later i drove my car one day to check it and it started to feel like i was gonna stall out the rpms kept dropping and rising. And now my car wont start . Any ideas on what could be wrong??? Please email me at Faisal@impfirm.com
I have a 96" LT-4..
I was stopped at a light and whne i started to drive it was a huge dip in the raod and was impossible to avoid it. I drove over it at about 2-3 mph. It sounded like the car bottomed out. it was a loud bang type noise. Ever scince that day it started making a ticking noise from 2,000-5,000 Rpms, in all gears. I Checked the oil and all my fluids and they were all fine.about three weeks later i drove my car one day to check it and it started to feel like i was gonna stall out the rpms kept dropping and rising. And now my car wont start . Any ideas on what could be wrong??? Please email me at Faisal@impfirm.com
Race Director
Joined: Jun 2005
Posts: 17,640
Likes: 1
From: Lenoir City TN
St. Jude Donor '08-'09-'10-'11
Is the oil pan damaged? It did not happen to get pushed into the oil pickup tube inside the pan? I am not familiar with the 96 underside, just a thought.
Bob
Bob
Racer
Joined: Jun 2006
Posts: 408
Likes: 0
From: Elkton MD
Hit bump, no power
The rpm dropping and rising could result from restricted exhaust. You may have crushed the pipes or fractured the internals of one or both of the catalytic converters. I ran over a curb once in a '55 original small block and pinched the tail pipe. Car would not run.
Or you may have depressed the oil pan slightly, as mentioned, so it touches the oil pump. I've had dented oil pans click and it was certainly rpm related but of course not gear related. The depression in the oil pan was so slight that it was very difficult to see.
Or you may have depressed the oil pan slightly, as mentioned, so it touches the oil pump. I've had dented oil pans click and it was certainly rpm related but of course not gear related. The depression in the oil pan was so slight that it was very difficult to see.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
We don't have crystal *****.
(Heck, some of us don't have any ***** at all!)
Larry
code5coupe
Le Mans Master
Joined: Jan 2006
Posts: 8,246
Likes: 114
From: Watkins Glen NY
I don't think you are going to get any driveshaft to turn "easily" by hand , in neutral or otherwise. Think about grabbing it by hand, and trying to get the wheels to turn!
Not gonna be easy.
I don't think you blew your engine. RPMs wouldn't fluctuate like you describe to kill the engine (lots of rotating mass). I know nothing about LT4's, but an RPM fluctuation and then failure to start sounds more like a coincidence, perhaps due to not being driven frequently. JMHO.
However, a crushed exhaust is an interesting possibility
Not gonna be easy.I don't think you blew your engine. RPMs wouldn't fluctuate like you describe to kill the engine (lots of rotating mass). I know nothing about LT4's, but an RPM fluctuation and then failure to start sounds more like a coincidence, perhaps due to not being driven frequently. JMHO.
However, a crushed exhaust is an interesting possibility
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
Was wondering any one could help out.
I have a 96" LT-4..
I was stopped at a light and whne i started to drive it was a huge dip in the raod and was impossible to avoid it. I drove over it at about 2-3 mph. It sounded like the car bottomed out. it was a loud bang type noise. Ever scince that day it started making a ticking noise from 2,000-5,000 Rpms, in all gears. I Checked the oil and all my fluids and they were all fine.about three weeks later i drove my car one day to check it and it started to feel like i was gonna stall out the rpms kept dropping and rising. And now my car wont start . Any ideas on what could be wrong??? Please email me at Faisal@impfirm.com
I have a 96" LT-4..
I was stopped at a light and whne i started to drive it was a huge dip in the raod and was impossible to avoid it. I drove over it at about 2-3 mph. It sounded like the car bottomed out. it was a loud bang type noise. Ever scince that day it started making a ticking noise from 2,000-5,000 Rpms, in all gears. I Checked the oil and all my fluids and they were all fine.about three weeks later i drove my car one day to check it and it started to feel like i was gonna stall out the rpms kept dropping and rising. And now my car wont start . Any ideas on what could be wrong??? Please email me at Faisal@impfirm.com
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
What do you mean you tried to turn the driveshaft ? Did you have both rear wheels off the ground and the car out of gear ? I am not in any way trying to insult you, but I can't assume what you do or do not know. Even with it in the air and both wheels off the ground the driveshaft will be a bitch to turn.
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Thread Starter
Intermediate
Joined: Jan 2007
Posts: 27
Likes: 0
From: Laurel Maryland
When i tryed to start it, it wont turn over it just clicks once and then nothing...... i will get under the car this week.
My buddy brong a pri bar to try to turn it... but i didnt have the wheels off the ground... so maybe thats why i am not to sure...
i am kinda new to this working on my car my self.. but would love to try to figure this out... and i appreiciate all the help.....
if there is any books you guys can suggest to get more familiar with my c4 please let me know.....
Thanks
My buddy brong a pri bar to try to turn it... but i didnt have the wheels off the ground... so maybe thats why i am not to sure...
i am kinda new to this working on my car my self.. but would love to try to figure this out... and i appreiciate all the help.....
if there is any books you guys can suggest to get more familiar with my c4 please let me know.....
Thanks
Race Director
Joined: Jun 2005
Posts: 17,640
Likes: 1
From: Lenoir City TN
St. Jude Donor '08-'09-'10-'11
At this point go to the basics, but it might be best if you purchase the Factory Service Manual for your year.
Battery voltage = what is it?
Starter = solenoid bad possibly?
Others will add to the list
As for turning the engine over, you do not have to have the wheels off the ground, just have the car in neutral and a ratchet or breaker bar with the correct size socket on the balancer if you can get to it, again not familiar with the LT series.
Bob
Battery voltage = what is it?
Starter = solenoid bad possibly?
Others will add to the list
As for turning the engine over, you do not have to have the wheels off the ground, just have the car in neutral and a ratchet or breaker bar with the correct size socket on the balancer if you can get to it, again not familiar with the LT series.
Bob
Last edited by Bob CTS; Jan 29, 2007 at 10:25 AM.
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Normally I would encourage a person to do his own work but from what I can tell from your posts is that you may be in way over your head. You need to find someone who really knows cars to check your car over. I applaude you for wanting to do the work yourself but you need to start with a good running car and do some basics like oil changes etc. just to get to know the car better. Once you feel comfortable doing small maintenance work then you can move on to bigger things.
As you have been told already, any damage you may have done will be easily spotted if you look under the car, once you find the damage if there is any, then you need to get someone with experience to assess the damage.
As you have been told already, any damage you may have done will be easily spotted if you look under the car, once you find the damage if there is any, then you need to get someone with experience to assess the damage.
Burning Brakes
Joined: Jan 2006
Posts: 847
Likes: 0
From: Colorado Springs CO
At this point go to the basics, but it might be best if you purchase the Factory Service Manual for your year.
Battery voltage = what is it?
Starter = solenoid bad possibly?
Others will add to the list
As for turning the engine over, you do not have to have the wheels off the ground, just have the car in neutral and a ratchet or breaker bar with the correct size socket on the balancer if you can get to it, again not familiar with the LT series.
Bob
Battery voltage = what is it?
Starter = solenoid bad possibly?
Others will add to the list
As for turning the engine over, you do not have to have the wheels off the ground, just have the car in neutral and a ratchet or breaker bar with the correct size socket on the balancer if you can get to it, again not familiar with the LT series.
Bob
Check your battery and basics.The original problem ? Could be anything...
Did the original ticking sound happen in neutral or while in gear? And while at idle not moving?
Instructor
Joined: Mar 2005
Posts: 178
Likes: 0
From: Thornton CO
Have someone else look your car over for you.
For one thing...from all of the stuff you've been saying about what you hear with your engine, don't worry about the drive-shaft for now.
Your drive-shaft is linked directly to your rear wheels. If you do not have your rear wheels off the ground, you shouldn't be able to turn it...and if you were able to turn it, your car would move/roll forward or back. Your transmission being in neutral will "disconnect" the engine from the drive-shaft. So, if you can not get it to turn over, the problem would most-likely have to be with something in front of the transmission (ie - the engine).
Check these things first as others have stated:
First and foremost, check that oil pan. Next, crushed exhaust.
Good Luck!
Thread Starter
Intermediate
Joined: Jan 2007
Posts: 27
Likes: 0
From: Laurel Maryland
Error
I tried to turn my Drive shaft... It wouldn't turn and offered alot of resistance....
DOES THIS MEAN MY ENGINE IS BLOWN????
Please Any Ideas would be helpful
________________________________________ _____________________
I MEANT TO SAY I TRIED TO TURN THE CRANK SHAFT! With a breaker bar on the crankshaft bolt and it would not move. shouldn't the crank turn if the engine is NOT locked?
Is there anything else that would keep the crank from turning by hand?
ANY IDEAS????????????
DOES THIS MEAN MY ENGINE IS BLOWN????
Please Any Ideas would be helpful
________________________________________ _____________________
I MEANT TO SAY I TRIED TO TURN THE CRANK SHAFT! With a breaker bar on the crankshaft bolt and it would not move. shouldn't the crank turn if the engine is NOT locked?
Is there anything else that would keep the crank from turning by hand?
ANY IDEAS????????????
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
I tried to turn my Drive shaft... It wouldn't turn and offered alot of resistance....
DOES THIS MEAN MY ENGINE IS BLOWN????
Please Any Ideas would be helpful
________________________________________ _____________________
I MEANT TO SAY I TRIED TO TURN THE CRANK SHAFT! With a breaker bar on the crankshaft bolt and it would not move. shouldn't the crank turn if the engine is NOT locked?
Is there anything else that would keep the crank from turning by hand?
ANY IDEAS????????????
DOES THIS MEAN MY ENGINE IS BLOWN????
Please Any Ideas would be helpful
________________________________________ _____________________
I MEANT TO SAY I TRIED TO TURN THE CRANK SHAFT! With a breaker bar on the crankshaft bolt and it would not move. shouldn't the crank turn if the engine is NOT locked?
Is there anything else that would keep the crank from turning by hand?
ANY IDEAS????????????
For example, did you put the car in neutral before trying to turn the crank with a breaker bar? If not, it won't budge.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
I suggest Tony's over in Gaithersburg. I would at least call him. He has a great rep... it's just that he doesn't work on maintenance issues, just restorations and such. but he might take on a bigger issue.
however, a good, local shop should be able to guide you.
A question - did you remove the plugs? that will tell you if there is anything in the cylinders. My 92 had a problem with the fuel pressure regulator, and it dumped fuel all inside the manifold, in turn, filling #6 and 8 cylinders with fuel. I removed plugs, gas poured out.
my guess? something got knocked loose, but nothing major happened. A big dip at 2-3mph shouldn't hurt jack.
however, a good, local shop should be able to guide you.
A question - did you remove the plugs? that will tell you if there is anything in the cylinders. My 92 had a problem with the fuel pressure regulator, and it dumped fuel all inside the manifold, in turn, filling #6 and 8 cylinders with fuel. I removed plugs, gas poured out.
my guess? something got knocked loose, but nothing major happened. A big dip at 2-3mph shouldn't hurt jack.