[xj] Smog Pump

XJ
1

Can anyone tell me what principal these smog pumps use ? Are they sliding vane blowers or actual pumps or what ?

Cheers,

Wilson.
2

Hello Jagsters!

It’s been awhile since I’ve visited, hopes all’s well with you and your vehicles. Last I communicated (May) my 87 Series III failed to pass California smog. Well, I am still not legal, and have no one in the immediate area to rely on for help. Closest Jag shop is about 60 miles away in Sacramento. So, I am diagnosing myself for the moment. Suggestions included failed smog pump, coolant temp sensor, air flow meter, catalytic converter, etc. M y last smog exam produced the following results:

@2500 RPM HC=8 Max allowed 140, average 20 - Very good!
CO=0.00 Max allowed is 1.00, average is 0.10 - Also very good!

Now the bad
@ Idle HC=180 Max allowed 120, Average 29 - Gross polluter
CO=3.53 Max allowed is 1.00, Average is 0.10 - Gross Polluter

I’ve pulled the hose from the air cleaner to the smog pump and the pump is blowing air OUT of this hose in a pulsating manner. I would think this is backwards. Shouldn’t it be sucking air in through this hose and pushing the air out through the hose connected to the air injection rail?

Thanks for your help as I whittle down the problems/solutions to getting this fixed.

Dennis===================================================
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3

Dennis wrote:
My last smog exam produced the following results:

@2500 RPM HC=8 Max allowed 140, average 20 - Very good!
CO=0.00 Max allowed is 1.00, average is 0.10 - Also very good!

Now the bad
@ Idle HC=180 Max allowed 120, Average 29 - Gross polluter
CO=3.53 Max allowed is 1.00, Average is 0.10 - Gross Polluter

Try removing the plug in the upper LH corner of the air flow meter &
turning the screw (either 3/16" or slotted screwdriver)
counter-clockwise about 3 full turns. This should lean it out
sufficiently. It would help if you had a friendly shop in the area that
would let you use their exhaust gas analyzer. Is California one of those
states that has minimum wage guys doing inspections who know nothing
about cars? Texas tried that for awhile but it doesn’t work. They need
to be able to make minor adjustments in order to pass a car.

Phil===================================================
The archives and FAQ will answer many queries on the XJ series…
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4

I agree, had to do the same thing last year for our SII, though the HC numbers
were the only bad ones and not by too much. Note the idle mixture screw may
be a hex socket, so a 5mm hex wrench will do the job.–
Alex
79xj6L SII (BRG + wires)
86xj6 SIII (Black)
61 Sprite MkII (Red)
Menlo Park, Calif.

philp1313@sbcglobal.net wrote:

Dennis wrote:
My last smog exam produced the following results:

@2500 RPM HC=8 Max allowed 140, average 20 - Very good!
CO=0.00 Max allowed is 1.00, average is 0.10 - Also very good!

Now the bad
@ Idle HC=180 Max allowed 120, Average 29 - Gross polluter
CO=3.53 Max allowed is 1.00, Average is 0.10 - Gross Polluter

Try removing the plug in the upper LH corner of the air flow meter &
turning the screw (either 3/16" or slotted screwdriver)
counter-clockwise about 3 full turns. This should lean it out
sufficiently. It would help if you had a friendly shop in the area that
would let you use their exhaust gas analyzer. Is California one of those
states that has minimum wage guys doing inspections who know nothing
about cars? Texas tried that for awhile but it doesn’t work. They need
to be able to make minor adjustments in order to pass a car.

Phil

===================================================
The archives and FAQ will answer many queries on the XJ series…
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5

I agree, had to do the same thing last year for our SII, though the HC numbers
were the only bad ones and not by too much. Note the idle mixture screw may
be a hex socket, so a 5mm hex wrench will do the job.On my 82 XJ6, it takes a 7/32 Alan key (hex wrench, I guess). Clock-wise to lower revs. Fazal Mel/Oz Cannara wrote:
===================================================
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6

Hi Alex and Phil,

Mine is hex head and turning it clockwise changed the numbers but not for the better. One went up while the other went down (I think the CO went up, but can’t remember for sure) I am now cleaning out the throttle body and making the .002 adjustment, but it seems rather odd to me that this would change at all. It does appear slightly off though. The ROM says to set the feeler gauge in between the wall of the body and the butterfly plate and raise the adjusting screw until it just barely touches the arm. The feeler gauge still seems to have significant drag when pulling out and I am wondering if the adj. screw should be turned a little more upward to produce less drag on the feeler gauge and a more accurate .002 adjustment?

Thanks for your thoughts.
Dennis-----Original Message-----
From: Cannara [SMTP:cannara@attglobal.net]
Sent: Monday, August 12, 2002 6:49 PM
Cc: ‘XJ@Jag-Lovers.org’
Subject: Re: [xj] Smog Pump

I agree, had to do the same thing last year for our SII, though the HC numbers
were the only bad ones and not by too much. Note the idle mixture screw may
be a hex socket, so a 5mm hex wrench will do the job.

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: http://www.jag-lovers.org/lists/search.html

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7

No. no, turn it ccw for leaner Dennis!–
Alex
79xj6L SII (BRG + wires)
86xj6 SIII (Black)
61 Sprite MkII (Red)
Menlo Park, Calif.

Dennis Burford wrote:

Hi Alex and Phil,

Mine is hex head and turning it clockwise changed the numbers but not for the better. One went up while the other went down (I think the CO went up, but can’t remember for sure) I am now cleaning out the throttle body and making the .002 adjustment, but it seems rather odd to me that this would change at all. It does appear slightly off though. The ROM says to set the feeler gauge in between the wall of the body and the butterfly plate and raise the adjusting screw until it just barely touches the arm. The feeler gauge still seems to have significant drag when pulling out and I am wondering if the adj. screw should be turned a little more upward to produce less drag on the feeler gauge and a more accurate .002 adjustment?

Thanks for your thoughts.
Dennis

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
Archives: Jag-lovers Forums - Jag-lovers

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