2001 Hyundai Elantra car lacks power

Tiny
BYLLH74
  • MEMBER
  • 2001 HYUNDAI ELANTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 175,000 MILES
Hi, I was given an 01 hyundai elantra that didnt run. Didnt know what happened to it but I did get it running. I put a new head gasket in it, all the valves were ok and no warpage. I also replaced the main and rod bearings cause of knocking. When I started I placed everything at top dead center along with the camshafts. It starts and runs, but it lacks power. I keep getting the code 0340 (cam position sensor) which I have replaced. Any ideas where to go next?
Wednesday, June 30th, 2010 AT 9:16 AM

9 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there, start with re checking the cam timing, it may be a tooth out, start here.

Mark (mhpautos)
Was this
answer
helpful?
Yes
No
Wednesday, June 30th, 2010 AT 10:11 AM
Tiny
BYLLH74
  • MEMBER
  • 26 POSTS
Thank you. I will recheck all the timing marks today. Ill post my results after I finish
Was this
answer
helpful?
Yes
No
Wednesday, June 30th, 2010 AT 10:17 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
OK, if the timing is correct, we will look further into this problem.

Mark (mhpautos)
Was this
answer
helpful?
Yes
No
Wednesday, June 30th, 2010 AT 10:21 AM
Tiny
BYLLH74
  • MEMBER
  • 26 POSTS
Sorry, I have been sick and havent worked much on the car. I did check the timing and it was right on. I did set it ahead and behind a tooth. Setting it 1 tooth back did make it run even worse. But forward didnt change it much at all. The history on the car I know is that it broke about a year ago. The owner said it just stopped and wouldnt do anything. Prior to that it did have a new head and gasket put in. But nothing on the lower engine. It was supposedly ran out of oil cause of a stripped oil pan drain plug (which I replaced with another oil pan from wrecking yard). Its sat in her driveway for about a year until I picked it up a few weeks ago. Maybe gas is bad. Im not sure where to go with it. It still gives me the code 0340 (cam position sensor). Thanks, I appriciate your help on this project.
Was this
answer
helpful?
Yes
No
Monday, July 5th, 2010 AT 8:23 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
I must apologise my self, I am on leave just now and I have just popped into an Internet cafe to check my Emails, I will be back on line full time next week, I don't have any information on hand to work with just now.

Mark
Was this
answer
helpful?
Yes
No
Monday, July 5th, 2010 AT 9:02 PM
Tiny
BYLLH74
  • MEMBER
  • 26 POSTS
No problem Mark. Thanks so much for getting back to me. Enjoy

Bill
Was this
answer
helpful?
Yes
No
Monday, July 5th, 2010 AT 9:57 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi Bill,

I am back at home now, can you give me an up date as to where your at with this problem?

Mark.
Was this
answer
helpful?
Yes
No
Saturday, July 10th, 2010 AT 6:03 AM
Tiny
BYLLH74
  • MEMBER
  • 26 POSTS
Hey Mark, I hope you enjoyed your time away. As far as the car, I haven't done much with it since the timing. I did find out that the gas in the tank has been sitting for about a year or a little more. Don't know if that could cause it to have no power. It seems like it lacks power when I push on the gas. At idle it sounds really good. Still have the code 0340 (cam position sensor). Compression is right at 150 on all 4 cylinders. Transmission fluid is full and oil is good. If u need any more info, let me know. Thanks again

Bill
Was this
answer
helpful?
Yes
No
Saturday, July 10th, 2010 AT 7:55 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
HI Bill,

Had a great time, holidays are always way to short, but back to the salt mines we must head, lol. OK, With the valve timing correct and a cam sensor indication still showing we may have a bad connection at the loom plug, maybe a corroded terminal or a loose pin, I would drain the stale fuel and flush the lines, replace the fuel filter and add a liberal dose of injector cleaner as well, go through these steps and get back to me with what you find, also don't disregard a faulty sensor if all checks are ok.

Mark (mhpautos)
Was this
answer
helpful?
Yes
No
Saturday, July 10th, 2010 AT 9:29 PM

Please login or register to post a reply.

Related Engine Low Power Content

Fix an Engine with Low Power!
VIDEO
Fix an Engine with Low Power!
Instructional repair video
Symptoms of Low Engine Power
GUIDE
Symptoms of Low Engine Power
The power your car's engine is producing is important. When you step on the gas you need your car to accelerate, mainly to keep you out of trouble when getting onto the...
VIEW MORE