1995 Isuzu Rodeo Question grey smoke out exhaust

Tiny
JERRYLHUSSEY
  • MEMBER
  • 1995 ISUZU RODEO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 249,256 MILES
My rodeo is blowing grey smoke out the exhaust. I didnt have this problem until replacing the ignition control module and ignition coil. At the same time I replaced the valve cover gasket on the driver side. Now the engine hesitates and blows black and grey smoke. What could be the cause?
Thursday, December 24th, 2009 AT 9:29 AM

6 Replies

Tiny
IMPALASS
  • MECHANIC
  • 3,112 POSTS
Hello

To better assist you is your model the LS or S and what is the engine size in liter.
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Thursday, December 24th, 2009 AT 10:29 AM
Tiny
JERRYLHUSSEY
  • MEMBER
  • 4 POSTS
It is a 3.2L 24 valve V6 it is the 95 rodeo LS
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Thursday, December 24th, 2009 AT 10:52 AM
Tiny
IMPALASS
  • MECHANIC
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Hello

Thanks for the info

Grey usually indicates brake fluid.

Since it just happened you may have a hose or check valve on backwards.

When you changed the valve covers did you disconnect the power brake unit vacuum hose? It has a one way check valve in it. Check the vacuum hose (with check valve) from power brake unit. Note installed direction for proper check valve operation (arrow on hose label faces engine).

Let me know
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Thursday, December 24th, 2009 AT 11:21 AM
Tiny
JERRYLHUSSEY
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No I did not disconetc the vacum hose from the brake unit. I did disconnect the plugs from the fuel injectors to loosen the wiring harness. Also removed the throtle body and assosiated hoses
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Thursday, December 24th, 2009 AT 11:35 AM
Tiny
JERRYLHUSSEY
  • MEMBER
  • 4 POSTS
It also has black soot blowing out the tail pipe on the ground
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Thursday, December 24th, 2009 AT 11:36 AM
Tiny
IMPALASS
  • MECHANIC
  • 3,112 POSTS
Hello

While I look at the manual please disconnect the brake booster hose at the manifold and check for brake fluid

Also check out the injector pulse kit from Auto Zone and ensure you are getting a good fire at each injector

Are any of the spark plugs wet with fuel indicating that cylinder is not firing
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Thursday, December 24th, 2009 AT 12:19 PM

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