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So since the cap bank alone wouldn't start my Fiat, I've paralleled it with the lead acid battery in my Renault, in an effort to prolong the battery's life in stop start use.
Problem is the car is now reluctant to cold start. If left for a few days it will start (the ECU always revs to 1500 on start), rev to 1500 stumble and die. When restarted, it will rev to 1500, stumble, and then idle fine.
If left over night it starts, stumbles and then idles fine. Hot starts are no problem.
Any ideas as to what is going on?
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