Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - '84 Renault Fuego Turbo Problems (Bosh L-Jetronic FI)
View Single Post
  #5 (permalink)  
Old 05-01-2004, 07:31 AM
club327's Avatar
club327 club327 is offline
Member
 
Last photo:
Join Date: Nov 2003
Location: australia
Age: 50
Posts: 334
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The Ljetronic, like most efi's, feeds a constant 12v to its injectors and switches them on and off by grounding the negative wires. When the engine is rotating/running the negative feed to the injectors would be triggering on and off.........the more fuel required the longer the injectors would be earthed. From memory were talking 3/1000 of a second on average duty cycle. Now in your case we've got a huge dump of gasoline for some reason. You're saying the injectors are spraying without the engine running? Well that sounds like the injectors are constantly grounded to earth which would cause them to be permanently opened. But my guess is that the efi computer is not receiving the signal from the temperature sensor and thinks the engine's is -50 degrees cold therefore opening the injectors for most of the cycles causing a major flood. Remove the spark plugs, kill the ignition and crank the engine. You'll probably see raw fuel squirting out from the spark plug holes. Check the connections at the temperature sensor for excessive corrosion - which is usually a green powdery build up (the sensors are normally near the thermostat housing). Carefully clean the connections with a scraper but trying not to open the female tangs too much or they'd become weak. Finally give the connections a spray with WD40 or similar and reconnect the plug. Now crank the engine to purge the excess fuel from the cylinders, clean the plugs and refit them. If this is the fault then the engine should start. Once sorted out you will need to change the engine oil due to the fuel contamination. Good luck......if it's not that......burn it!
Reply With Quote