NO POWER WHEN TRYING TO ACCELERATE

  • Tiny
  • Michael11457
  • 2007 CHRYSLER PT CRUISER
  • 10,000 MILES

Car will not accelerate properly. When pressing the gas at a normal rate RPM's go up but not speed. We have to push the gas at a VERY slow rate, being patient for it to gain speed slowly. Car also dies at stop signs with any kind of air running. My husband had to unplug the device for the heater because it would emit some kind of fumes through the vents even when heater was not on. We used a tester and got the codes, we just don't know what they are.
Codes:
PO300-misfire random multiple cylinder detected
PO301-cylinder 1 misfire
PO420-catalyst systems below threshold
PO700-transmission control system malfunction
PO731-gear 1 incorrect ratio

I would greatly appreciate ANY assistance in this matter thank you.

Do you
have the same problem?
Yes
No
Saturday, August 4th, 2012 AT 7:12 PM

10 Replies

  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

I would address the missfires first. Check compression and then tune it up with plugs, wires.

The 420 cat code is a result of driving with a miss. It may or may not damaged the converter. If the code returns, you will have to replace it.

We will see about the trans codes after the motor is running well again.

Roy

Was this
answer
helpful?
Yes
No
Saturday, August 4th, 2012 AT 7:20 PM
  • Tiny
  • Michael11457
  • MEMBER

Ok changed plugs, checked compression
results:
cylinder 1: 140psi
cylinder 2: 95psi
cylinder 3: 95psi
cylinder 4: 145psi

Was this
answer
helpful?
Yes
No
Sunday, August 5th, 2012 AT 2:00 AM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

How does it run?

Roy

Was this
answer
helpful?
Yes
No
Sunday, August 5th, 2012 AT 2:02 AM
  • Tiny
  • Michael11457
  • MEMBER

Still runs the same real bad, accelerates very slowly, no power at all. Had to take the back roads and was getting hot also yesterday.

Was this
answer
helpful?
Yes
No
Sunday, August 5th, 2012 AT 6:03 PM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

It sounds like the cat may be clogged not allowing the motor to breathe.

Roy

Was this
answer
helpful?
Yes
No
Sunday, August 5th, 2012 AT 6:22 PM
  • Tiny
  • Michael11457
  • MEMBER

Do you think that it might be the head gasket because of the two cylinders that don't have compression? Is there a way to test the cat? Maybe taking it off and running it for a few minutes?

Was this
answer
helpful?
Yes
No
Monday, August 6th, 2012 AT 5:14 PM
  • Tiny
  • Michael11457
  • MEMBER

I took the cat off and the first thing you see is a screen like piece that looks almost completely plugged up inside it does that confirm that its the cat or that its plugged, thanks

Was this
answer
helpful?
Yes
No
Monday, August 6th, 2012 AT 11:09 PM
  • Tiny
  • Michael11457
  • MEMBER

Im going to take to the car wash and see if I can clean it up any more

Was this
answer
helpful?
Yes
No
-1
Tuesday, August 7th, 2012 AT 1:35 AM
  • Tiny
  • Michael11457
  • MEMBER

Your right it was the catalytic converter thanks, car runs a lot better now, I was reading I should have put a pressure tester in below o2 sensor hole and then in the above sensor hole to see it there was restriction. Instead I took it off and rinsed it out and then took it to the car wash which tore up some of the material inside which cant be to good for emissions, when I saw it tearing it up I stopped cleaning. It anyways rinsed it out with clean water and then installed it and it was running perfect, I may of bought myself a little time, atleast its drivable now, would not go before at all. So glad I found the problem, thanks you very much for your help

Was this
answer
helpful?
Yes
No
Tuesday, August 7th, 2012 AT 5:19 AM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

You will need to replace it. What you did is not a fix, it is a band aid.

Good luck

Roy

Was this
answer
helpful?
Yes
No
Tuesday, August 7th, 2012 AT 10:11 AM

Please login or register to post a reply.

Other Accelerator Questions