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jeffb
Member
| Joined: | Monday June 12th, 2006 |
| Location: | |
| Posts: | 2 |
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Posted: Tuesday June 13th, 2006 12:28 am |
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i have a shop in maui,hawaii.
customer brought in from new zealand,what he said was a 75 cooper.
the thing isrunning extremely rich,just dumping fuel in throttle body.
upon examination,we see modifications like---rover ecu,single point injection,aftermarket coil,empty distributor with plug wires still attached to cap.
cant seem to find answer to why its running rich.
any suggestions or has anyone encountered this before.?
thanks for any help
jeff
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jeffb
Member
| Joined: | Monday June 12th, 2006 |
| Location: | |
| Posts: | 2 |
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Posted: Tuesday June 13th, 2006 12:28 am |
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jeffb wrote: i have a shop in maui,hawaii.
customer brought in from new zealand,what he said was a 75 cooper.
the thing isrunning extremely rich,just dumping fuel in throttle body.
upon examination,we see modifications like---rover ecu,single point injection,aftermarket coil,empty distributor with plug wires still attached to cap.
cant seem to find answer to why its running rich.
any suggestions or has anyone encountered this before.?
thanks for any help
jeff
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hanlminiman
MCR Member
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Posted: Tuesday June 13th, 2006 05:44 pm |
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| spi engines were introduced in te 1990's. As you are in Hawaii your best course of action is to get a workshop manual for 1990's cars but as with most Minis, owners often make their own modifications. The spi Minis were the first with Electronic Engine Management systems (EMS). If you visit Minispares, or Gaydon Heritage Centre or Amazon you will be able to get CD's with everything on or in the case of Amazon and Haynes Manual for cars up to 1996.
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64cooperS
Member
| Joined: | Saturday June 24th, 2006 |
| Location: | |
| Posts: | 23 |
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Posted: Saturday June 24th, 2006 09:15 pm |
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Assuming the installation of the Spi system has been done correctly, (oxygen sensor fitted in exhaust manifold etc), the most likely cause of the engine running rich is damage to the MAP sensor pipe, which runs from the back of the manifold to a vapour trap, (in one section), and then from the vapour trap to the ECU, (in which is the MAP sensor).
If these pipes get damaged, (holed broken or chafed through), the ECU assumes that there is low/no vacuum, (which normally only occurs under wide throttle openings) and will dump loads of fuel into the engine resulting in black smoking from the exhaust and excessive fuel consumption.
Also if you have diagnostic equipment and after trying the above the problem persists check to make sure the oxygen sensor is switching correctly.
As a point of reference even when the engine is running correctly the fuel injector looks as if it is spraying a lot of fuel in when viewed whilst ticking over as the Spi system is not as efficient as the later port fuel injection used on the twin point minis.
Hope this helps with your problem.
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