Question about 2005 Chevrolet Suburban

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1986 gas suburban loses power at 50 mph

Runs good to 50 mph if you push gas pedal fast it bogs down

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  • Contributor
  • 3 Answers

Have you had the converter checket out. If they get plugged it will lose power

Posted on Jan 23, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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tripletauto
  • 1450 Answers

SOURCE: Not getting fuel

REPLACE YOUR FUEL FILTER

Posted on Oct 06, 2008

  • 5 Answers

SOURCE: i have a 1992 suburban 350 motor. truck had no

first thing i would do i would check fuel pressure if you have good fuel pressure then the next thing i would unbolt the exhaust from the exhaust manafold and then try to start engine if the engine starts up and runs fine then you have clogged up exhaust converters

terry - Master tech

Posted on Jun 18, 2009

Molson02536
  • 3854 Answers

SOURCE: I have an 1989 chevy

It sounds like you may have a bad fuel pressure regulator. The fuel pressure regulator is in the throttle body housing and the throttle body in your truck works best at 13psi to 15psi, Any other setting will cause problems. Check the vacuum hose to the fuel pressure regulator at the throttle body and check the fuel pressure at the shredder valve. The way the throttle body works is for the first 75% of the throttle, the ecm uses the signal form the O2 sensors to control the air fuel ratio and tries to keep it to 14.7:1 but at full throttle it by pass the O2 sensor signal and runs the engine richer and advances the timing so you can drive with wings like red bull. The Map sensor then takes over to promote the engine to run richer so you don't run lean and detonation occurs. If there is a problem with your throttle body position sensor, map sensor. and fuel pressure regulator, then at WOT (skinny peddle down) you may be running to rich. The other thing to is if your fuel pressure drops at WOT you'll get a lean condition and then you'll have detonation ( Knocking) and the timing will be turned down to keep detonation from occurring again and that may be the cause if your check engine light too. First and easiest thing to do is change the fuel filter and add fuel injector cleaner to you gas tank, buy a throttle body cleaner and clean your throttle body to make sure you don't have varnish build up around the throttle body, just follow the instruction on the can. Throttle body cleaner not carb cleaner. Start with that and i hope we don't have to do any more to get your truck running like a rocket. Good luck and keep me posted. Be glad to help. 

Posted on Jun 23, 2009

heavymetal77
  • 721 Answers

SOURCE: 2003 suburban Losing power.....

Do a back pressure check on the cat converter if gas powered. Diesel doesn't have one. If you get 1lb or more psi of back pressure the cat is bad. Also check the fuel pressure with a gauge when this happens.

Posted on Jul 16, 2009

  • 8 Answers

SOURCE: chevy engine bogs out when you give it gas

this might sound crazy but your timing could be off....you may want to check that

Posted on Aug 13, 2009

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