Vehicle & Technical > Range Rover

Hunting Engine

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Dave Rogers:
Hi, thanks for your comments, checked the wiring, I did wire the injector dc feed to a relay which turns off when the gas is on, the comment about the flap valve set me thinking and it seems to me that the anti blowback flap might be the cause, checked it out and the spring had broken, replaced the spring and hey presto..................... running better already

The switch I put in to do the change over is a 'soft' switch using a ttl chip, that then activates a pic programmed chip to activate relays via some 1A drive transistors. It's then a simple matter of triggering some relays, tried to find some solid state 1A switches but couldn't find one robust enough. One tap of the finger sees the relay go through a process with led's showing progress and status of the relays. The engine if it stops, automatically switches off the gas as the default state of the relays are normally open, a voltage regulator looks after the gas, when the voltage drops below a nominal value (not 12vdc), it turns the gas off.  
As I said, I work with electronics.................. not that good at setting up fuel systems/air/fuel mix tho so thanks for your help, sometimes the simplest of causes........

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