Engine shake

Tiny
GEARHEADED1
  • MEMBER
  • 2002 DODGE NEON
  • 2.0L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 92,000 MILES
After coming to a stop, the engine can sometimes shake very hard, in fact, it makes the steering wheel vibrate. But if you put it into neutral, it will smooth out and stay that way when you put it back into drive, until you come to a stop again. When you put it into reverse, it will also shake then as well. The trans was just recently rebuilt and a new converter put in. The trans shifts perfectly, no slippage or weird noises. There are no codes for the trans, just the IAT on the engine side of things. The main motor mounts were replaced when the valve job and timing belt work was done. The injectors were removed and cleaned, tested for spray pattern and all are fine. Plug wires are almost new silicone rubber ones, plugs are new.
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Saturday, February 20th, 2016 AT 12:39 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,554 POSTS
It sounds like you could have an intake valve that is starting to leak, please have a leak down test done or do it yourself, please let us know what happens
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Wednesday, February 24th, 2016 AT 12:11 PM
Tiny
GEARHEADED1
  • MEMBER
  • 2 POSTS
The valves were just done when the broken timing belt and bent valve were replaced. I can do a compression test, but I'm sure that it will be fine. A bad valve won't go away when the trans is taken out of drive or reverse, will it? I don't have a leak down tester or know of anyone who does.

Randy
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Wednesday, February 24th, 2016 AT 7:14 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,554 POSTS
Have you checked of a vacuum leak? Also the mass air flow sensor could cause some problems if it is dirty. Here are some guides to help out.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/mass-air-flow-service

please let me know how it goes

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Thursday, February 25th, 2016 AT 11:01 AM

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