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Hard to start when engine is hot

Tiny
ADAMM12
  • MEMBER
  • 1999 CHEVROLET CAVALIER
  • 2.2L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 141,000 MILES
Hi, I got this car and two years ago and when I bought it it would be hard to start when engine is hot. I would go to a store come back out and it would just crank and crank until I gave it some gas then it would start up. The engine went six months ago and our mechanic put a used engine in it and replaced the fuel pump, fuel filter, and crank position sensor. The car still does it and we can not figure it out.

If you could get back to me with help I would appreciate it.
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Tuesday, July 25th, 2017 AT 2:37 PM

11 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
Hello,

When the mechanic replaced the pump did he take out the vibration damper? This parts sits between the pump and the tank. Oval shaped part that caused the problem you are talking about.

Here is a guide that can also help

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Please let us know what happens.

Cheers, Ken

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Wednesday, July 26th, 2017 AT 11:31 AM
Tiny
ADAMM12
  • MEMBER
  • 6 POSTS
He said that damper your talking about is the o ring that seals the fuel pump to the tank.
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Wednesday, July 26th, 2017 AT 1:03 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
No, its in-line with the fuel pump and sender. I may not have it but if it does they created big problems.
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Friday, July 28th, 2017 AT 10:26 AM
Tiny
ADAMM12
  • MEMBER
  • 6 POSTS
What else word you think it would be if it's not the damper bc it has the pump fuel filter and only does it when engine is hot? Thank-you for getting back to me.
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Friday, July 28th, 2017 AT 1:02 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
I think the temperature sensor for the computer could be off causing the hard starting problem.

Here is a guide that will show you what you are in for when doing the job.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Please let us know what happens.

Cheers, Ken
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Saturday, July 29th, 2017 AT 10:59 AM
Tiny
ADAMM12
  • MEMBER
  • 6 POSTS
Ok I'll have to buy one and install it. I'll let you know if it worked or not.
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Saturday, July 29th, 2017 AT 1:06 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
Please let us know what you find.

Cheers, Ken
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Saturday, July 29th, 2017 AT 8:24 PM
Tiny
ADAMM12
  • MEMBER
  • 6 POSTS
Put that new engine temp sensor in and I'm still getting the same problem so I also put in a new crank sensor too and didn't solve the problem. Any advice on what to try next?
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Monday, July 31st, 2017 AT 1:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
Hello,

I just though of a problem that this can be caused by a vacuum leak. Here is a test to follow to see if it could be the problem.

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

and

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Please let us know what you find.

Cheers, Ken
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Wednesday, August 2nd, 2017 AT 10:27 AM
Tiny
ADAMM12
  • MEMBER
  • 6 POSTS
We smoked the evap system dismoring and there's no vacuum leaks
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Thursday, August 3rd, 2017 AT 7:05 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
It sounds like you have a computer problem. I would try plugging in a used unit to see if that helps.
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Thursday, August 3rd, 2017 AT 10:28 AM

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