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Matt
Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22001
Experience:  BEng hons Mech engineering, in auto industry 22 years
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My lovely 15 year old mazda mx5 is occasionally struggling

Resolved Question:

My lovely 15 year old mazda mx5 is occasionally struggling in low gear. i have changed the plug leads and plugs. still the same. any idea
Submitted: 3 years ago.
Category: Car
Expert:  Matt replied 3 years ago.
Hello

this sounds like a lack of fuel and could be a lack of fuel pressure from the electrical pump at the tank.

If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injectors and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.
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