Hesitates on take off and backfires

1995 HYUNDAI TRUCK
269,843 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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RALPH CHAVARRIA
  • MEMBER
  • 4 POSTS
New distributor, rotor, wires,cap,plugs,idle air control valve, map sensor, TPS, oxygen sensor,knock sensor, timing set on point. starts but when i give it gas hesitates on take off and backfires. Help.
Jun 17, 2019 at 2:08 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

I would start by checking the compression. It will tell us if the engine is internally food and if the valve timing is correct.

https://www.2carpros.com/articles/how-to-test-engine-compression

Did you verify the firing order?

https://www.2carpros.com/articles/engine-backfires-while-running

Roy
Jun 17, 2019 at 7:43 PM
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RALPH CHAVARRIA
  • MEMBER
  • 4 POSTS
Yes, i did timing checked it five times.
Jun 18, 2019 at 5:01 PM
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RALPH CHAVARRIA
  • MEMBER
  • 4 POSTS
I need to get a pressure testing device to check it.
Jun 18, 2019 at 5:02 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Okay, keep us updated.

Roy
Jun 18, 2019 at 7:42 PM
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RALPH CHAVARRIA
  • MEMBER
  • 4 POSTS
Thank you Roy.
Jun 19, 2019 at 7:26 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
You are welcome.

always glad to help.

Roy
Jun 19, 2019 at 8:42 PM
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