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High RPM's AND LOW SPEED WITH HIGH FUEL CONSUMPTION

Tiny
SUMIT SAHA
  • MEMBER
  • 2001 HOLDEN APOLLO
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 161 MILES
I have a Holden Astra. Recently a problem showed up. My engine rpm goes way too high with low speed on road. Eats up fuel really a lot. Car starts vibrating. I have recently changed the timing belt. And I I have checked the computer codes. (No codes displayed). 161,000 km's running petrol unleaded. Why is it happening and any solution please?
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Tuesday, September 20th, 2016 AT 10:22 AM

8 Replies

Tiny
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  • MECHANIC
  • 31,937 POSTS
Re-check valve timing, check fuel pressure, and see if pressure increases with vacuum line off fuel pressure regulator, start here.
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Wednesday, September 21st, 2016 AT 5:13 AM
Tiny
SUMIT SAHA
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  • 5 POSTS
I did not get you properly. Can you please elaborate?
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Wednesday, September 21st, 2016 AT 5:22 AM
Tiny
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Can you check the fuel pressure, with the engine running and a fuel pressure gauge fitted, when you remove the vacuum line from the fuel pressure regulator normally fitted at the end of the fuel rail on the engine, the fuel pressure should increase.
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Wednesday, September 21st, 2016 AT 5:25 AM
Tiny
SUMIT SAHA
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  • 5 POSTS
Okay thank you. I have recently changed my transmission oil too. The gear does not shift to next gear. It holds the gear and rpm's go to 3 to 4.
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Wednesday, September 21st, 2016 AT 5:55 AM
Tiny
SUMIT SAHA
  • MEMBER
  • 5 POSTS
Can you tell how much it going cost to repair this problem? I am on tight budget.
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Wednesday, September 21st, 2016 AT 5:57 AM
Tiny
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Just can't say until the diagnosis is done and a fault is confirmed there may be other factors as well with out hands on diagnosis with these problems there is some uncertainty
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Wednesday, September 21st, 2016 AT 2:42 PM
Tiny
SUMIT SAHA
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  • 5 POSTS
I have check with a scanning machine but no codes came up.
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Thursday, September 22nd, 2016 AT 1:27 AM
Tiny
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Did you scan for transmission codes.
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Thursday, September 22nd, 2016 AT 5:31 AM

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