JordanG1980 Posted June 10, 2013 Share Posted June 10, 2013 im trying to repair a 97 ch600 with an e7 engine. the truck came to my shop not running. through some tests I determined the injection pump to be faulty and thus had it redone. I also rebuilt the econovance. after reassembly the engine has a mean hunt between 600 and 900 rpm. if you rev the engine above 1000 it smoothes out. no smoke or indication of the pump being out of time. sensors all seem to be working properly. any advice would be great. thanks JG Quote Link to comment Share on other sites More sharing options...
hatcity Posted June 10, 2013 Share Posted June 10, 2013 Where in South Florida? Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
bbigrig Posted June 11, 2013 Share Posted June 11, 2013 If the pins are loose or there is a bad connection at the injection plug harness connection (big grey plug near pump) That can cause some idle issues. Give the plug a twist and pull. If its faulty it will rev up and down or stall. Wouldn't hurt to Check your TPS (throttle position sensor) input to the ecm. Quote Link to comment Share on other sites More sharing options...
JordanG1980 Posted June 11, 2013 Author Share Posted June 11, 2013 west palm beach...I removed and cleaned the pins from the duetch connector it made no difference. I also disconnected the tps it actually raised the rpm but the hunt remained. I unplugged the the timing sensor from the flywheel and the hunt remained. I can unplug both the econovance solenoid and the TEM sensor and it makes no difference. Quote Link to comment Share on other sites More sharing options...
slpwlker Posted June 11, 2013 Share Posted June 11, 2013 Welcome to the jungle. Pembroke Pines here myself Quote Link to comment Share on other sites More sharing options...
hatcity Posted June 11, 2013 Share Posted June 11, 2013 Stooopid Stuart Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
2 STICK PUPPY Posted June 18, 2013 Share Posted June 18, 2013 the plastic gear on the lift pump goes bad ..... change the lift pump Quote Link to comment Share on other sites More sharing options...
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