micked Posted September 10, 2016 Share Posted September 10, 2016 1989 Value-Liner R688ST. Running rough and knocking. Another day trying to rectify. went back to basics and checked filters and fuel lines and replaced number two injector. Ran nice for five minutes, then went back to same miss and knock. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/ Share on other sites More sharing options...
alex g Posted September 10, 2016 Share Posted September 10, 2016 Mine had a miss before and after I replaced injectors. It did need new injectors but it was the fuel pump timing that caused the miss. Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345247 Share on other sites More sharing options...
micked Posted September 10, 2016 Author Share Posted September 10, 2016 thanks alex, pump hasn't been moved and used to run fine but i will have a look at timing Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345249 Share on other sites More sharing options...
j_martell Posted September 10, 2016 Share Posted September 10, 2016 The pump could be getting weak.... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345251 Share on other sites More sharing options...
fjh Posted September 10, 2016 Share Posted September 10, 2016 Sounds like the injection pump is on its way out the fuel transfer pump side loads the injector pump cam as the bearings wear the cam gets pushed to the side by the transfer pump making the timing irratic at the front two cylinders is good possibility! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345277 Share on other sites More sharing options...
micked Posted September 10, 2016 Author Share Posted September 10, 2016 reman injector pump done about 200.000km's. do you mean supply pump? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345304 Share on other sites More sharing options...
fjh Posted September 11, 2016 Share Posted September 11, 2016 Injection pump Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345333 Share on other sites More sharing options...
micked Posted September 11, 2016 Author Share Posted September 11, 2016 thanks fjh. it is the last resort but i have another pump i can put on.dissapointing if thats what it is , i assumed a pump would last a bit longer than this. only driving local runs within 100km's. anyway worth a try. what would be average km's for an Ambac 300 pump? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345342 Share on other sites More sharing options...
fjh Posted September 11, 2016 Share Posted September 11, 2016 There may be shiting up from the plunger as wel the injector will likly have to be changed as well Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345369 Share on other sites More sharing options...
micked Posted September 12, 2016 Author Share Posted September 12, 2016 injectors were done when pump was put on. i am going to put another supply pump on and see how that goes. filters are mounted next to radiator and the primary is at the top with secondary under that. after filling filters with fuel before putting on the primary now is half full after running. but truck starts fine. just seems strange, i assume filter should be full? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345453 Share on other sites More sharing options...
fjh Posted September 12, 2016 Share Posted September 12, 2016 Half fuel is Normal Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345474 Share on other sites More sharing options...
micked Posted September 14, 2016 Author Share Posted September 14, 2016 fjh, have you heard of putting two gaskets on delivery pump to lesson that tension you speak of on the Cam? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-345655 Share on other sites More sharing options...
micked Posted September 29, 2016 Author Share Posted September 29, 2016 ok going to change injector pump this weekend. its also getting a weird pulse in the fuel lines on the low pressure side of pump. this seems to run in time with the miss in engine. i will post results. if this is not problem,then somthing terminal must be wrong. Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347286 Share on other sites More sharing options...
Jamkar Posted September 29, 2016 Share Posted September 29, 2016 Hope it's not the same as my 350 which developed a bad knock and miss. 2 piece crankshaft was the problem. Good luck. Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347302 Share on other sites More sharing options...
micked Posted September 30, 2016 Author Share Posted September 30, 2016 had sump off checked crank and main bolts and no sign of any cracks round auxillery side of block Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347355 Share on other sites More sharing options...
steve p Posted September 30, 2016 Share Posted September 30, 2016 (edited) what timing is the pump ,is the pump off the engine ,if it is take the sump plate off DO NOT lay the pump right over when removing the plate ,place a clean white rag underneath the pump to catch the diesel if the brass bearings are shagged the brass particles will show up on the rag ,if the fuel is clean reseal the sump plate with Loctite 515 recharge the fuel gallery and rotate the pump through a few cycles to see if you have a lazy pumping element ,the delivery valve in the pumping unit do get stuck with the shit fuel we have here in oz ,I had the a simular problem with my 350 4v ,I also advanced the timing by extra 3 degrees NO MORE than that. when fitting your lift pump rotate the engine so the lift pump cam is on the back side of the cam not the nose ,it will make the fitting up of the pump easier steve Edited September 30, 2016 by steve p 1 Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347356 Share on other sites More sharing options...
micked Posted September 30, 2016 Author Share Posted September 30, 2016 thanks Steve,all makes sense. from memory the pump was set at 20degres BTC. the pump still on truck and will come off tomorrow but when cracking injector lines number two over fueling and number three lagging pressure. the old pump i have still ok just had governor problem. gunna swap governor's and refit. Hopeing this will sort out problem as i want a weekend back. Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347363 Share on other sites More sharing options...
micked Posted October 1, 2016 Author Share Posted October 1, 2016 well changed pumps and put newer governor on older pump seems to be getting fuel but can't get the bugger to start. thinking its a timing issue, but does the puff limiter valve need air supplied to it for some reason? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347453 Share on other sites More sharing options...
fjh Posted October 1, 2016 Share Posted October 1, 2016 (edited) NO should start unless you pulled it in with the bolts it should be in time enough to run! Ambac pump correct! Edited October 1, 2016 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347463 Share on other sites More sharing options...
micked Posted October 3, 2016 Author Share Posted October 3, 2016 ok had another go today. your right fjh, yes Ambac pump was one tooth out. got engine to run. knock has gone from number two and all cylinders getting good fuel but is still running rough.still has the same miss and like before when you muck around with it runs good at first and then gets worse. as usual getting frustrating but i know will get sorted eventually . got to stay positive Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347668 Share on other sites More sharing options...
steve p Posted October 3, 2016 Share Posted October 3, 2016 micked , can you do a video of it running please mate Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347669 Share on other sites More sharing options...
micked Posted October 3, 2016 Author Share Posted October 3, 2016 i will have video tommorow and try and upload. i think my nieghbours have had enough today. any feedback is appreciated. thanks Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-347670 Share on other sites More sharing options...
micked Posted October 7, 2016 Author Share Posted October 7, 2016 well haven't had a chance to do a video yet . but still tinkering. ran truck today and it feels like the chokes on. when you flatten ya foot plenty black smoke. one question though, when you take the return line off the head at the front of engine while it is running, should fuel squirt out? Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-348072 Share on other sites More sharing options...
steve p Posted October 7, 2016 Share Posted October 7, 2016 yes ,excess fuel is returned to the tank [the injector pump generates heat and excess fuel is used to cool the pump it is then returned to the rh fuel tank[ hot tank] where it is cooled by air flow over the tank and gravity feeds the fuel to the lh tank through the crossover line . Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-348109 Share on other sites More sharing options...
micked Posted October 8, 2016 Author Share Posted October 8, 2016 so should fuel return from the head constantly or just under load. this line comes out of the head and to a T fitting on the return at the pump. the other line goes to the starter for luberication. and also does it matter wich side of the fuel gallery on pump the delivery and return goes? only running one tank on right side Quote Link to comment https://www.bigmacktrucks.com/topic/46788-e6-350-4-valve/#findComment-348121 Share on other sites More sharing options...
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