92 Capri 1.6L DOHC non turbo hesitation / backfire on touch of throttle, poor acceleration

Asked by Jan 16, 2016 at 10:00 PM about the 1992 Mercury Capri 2 Dr STD Convertible

Question type: Maintenance & Repair

Have done all diagnostics and checked or replaced many parts and everything checks out fine, only thing that seems to work is to set timing at 12 to 14 deg BTDC which eliminates hesitation but acceleration still not perfect. Makes me think cam timing is out but checked it by removing top cam cover and setting on 0 deg TDC on compression stroke and cam marks line up, at a loss with this problem.

4 Answers

92,645

Did you set the timing with the spout connector disconnected? That has to be disconnected before setting the timing. Turn engine off warm, disconnect spout connector, start engine, set timing to specs on the emissions label, shut off engine, reconnect the spout connector and that should do it.

Yes timing was done correctly, wish it was that simple a problem.

Specs state that timing should be set at 0 deg BTDC but at that setting is when it runs at it's worst.

92,645

When I was working for Ford, it didn't happen very often but I did find the ECM was not advancing the timing as it should on a couple of vehicles, a timing light will be able to tell you if that is what is happening, hook up the light, unhook the spout connector, start the engine and look at the setting, shut it off, and plug in the connector, then restart it and check,the timing then it should be somewhere around 20 to 24 degrees advanced, if not check the crank sensor for proper ohms and clearance, if that checks then it is a good possibility that the ECM is your problem. HTH

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