Problem with fuel injection, Advice needed |
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Problem with fuel injection, Advice needed |
cal914 |
Mar 28 2017, 03:04 PM
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#1
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Member Group: Members Posts: 319 Joined: 12-April 12 From: United Kingdom Member No.: 14,366 Region Association: None |
Hi there
Just put our 1970 914 back to fuel injection from carbs and it purred for the first 30 minutes in slow moving traffic but then it began to cough and then was quickly nearly kangarooing down the street. It was fine idling but trying to pull away and driving it, it sounded as though it was misfiring or coughing or not running on all cylinders. What's the checklist for trying to solve the problem? Thanks! |
914sgofast2 |
Mar 30 2017, 04:53 PM
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#2
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Senior Member Group: Members Posts: 645 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
I don't think you have the right ECU. Our early 1970 does not have a knob on the ECU. The adjusting knob was added to the ECU's on lster models so they could trim the idle & emissions. As suggeted above, please check the F.I. part numbers on the site Bowlsby suggested to make sure they are correct for your model year. For best performance, the distributor, the ECU and the MPS all need to be compatible with each other. Also check the Auxiliary Air Regulator ("AAR") to make certain it is functioning properly. If the AAR is not closing entirely when the motor warms up (i.e., after 15 or 20 minutes) it will put the engine in an excessively lean condition and act like a vacuum leak. You will spend many hours trying to find a mysterious vacuum leak, when it is the AAR that has gone bad. (Don't ask me how I know.) Our car ran fine when it was cold, but terrible once it warmed up becasue the AAR was bad.
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