Replaced fuel pump and the car still does not start?

Tiny
AZDANNO04
  • MEMBER
  • 2008 CHEVROLET COBALT
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 139,455 MILES
The check engine light is on two same codes Camshaft position sensor A circuit low bank 1 or sensor. Already replaced Crankshaft and Camshaft sensor. Possibly timing jumped how can I check the timing chain to see if the markings were there supposed to be on the chain?
Sunday, June 4th, 2023 AT 6:53 PM

1 Reply

Tiny
BORIS K
  • MECHANIC
  • 762 POSTS
Hello,

Could you please post the fault codes set for further evaluation?

This vehicle is equipped with the GM Ecotec 2.2L engine.
It is fitted with a timing chain and balance shaft chain.

Good videos:
https://youtu.be/4vratX1Wy54
and
https://youtu.be/2hScoa75q7A

A guide:
https://www.cheviguide.com/cinfo-2377.html

Timing mark locations

Install the timing chain drive sprocket to the crankshaft with the timing mark in the 5 o'clock position.

See image 1

Important:
There are 3 colored links on the timing chain. Two links are of matching color, and one link is of a unique color. Use the following procedure to line up the links with the sprockets. Orient the chain so that the colored links are visible.

*Always use new sprocket bolts.

See image 2

Assemble the intake camshaft sprocket to the timing chain with the timing mark lined up with the uniquely colored link (1). Hand tighten a new intake camshaft sprocket bolt.

See image 3

Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).

See image 4

Route the timing chain around the crankshaft sprocket and line up the first matching colored link (2) with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.

See image 5

Align the timing mark on the sprocket with the last matching colored link (3). Install the bolt finger tight.

See image 6

Notice: Do not rotate either camshaft more than half turn in either direction with crankshaft at top dead center (TDC). To do so may cause valve to piston contact resulting in a damaged valve and/or a damaged piston.

Cheers, Boris

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Monday, June 5th, 2023 AT 9:07 AM

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