r686st Posted August 26, 2016 Share Posted August 26, 2016 (edited) I have a 1992 Mack RW613 with an electronic E7-350. It has had power trouble since I bought it used 2 years ago. On the low end it just doesn't have the grunt like my old mechanical 300 and am hoping to help it out by turning the fuel to it or adjusting it so that the rack will open up more in the pump. Can anyone post a diagram of the injection pump with parts breakdown and labels/numbers? I would also like a list of fuel pressures that this setup is suppose to have from the factor so I have a baseline to measure. I purchased the Blixxton box only to find out that someone had somehow cut the wiring harness and spliced it together with out a deutche plug to install the Blixxton:( I contacted Bosch and they said they didn't have any information on this style pump and gave me the number to a local shop who I called and the person on the phone said, that place had been out of business for 3 years!!!! Please help because I'm at the end of my rope with this truck. Edited August 26, 2016 by r686st Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/ Share on other sites More sharing options...
fjh Posted August 26, 2016 Share Posted August 26, 2016 (edited) Bud Is the fault light working? is it throwing up any codes? Its possible the( torque limit) switch on the trans is cutting the power back, if its not throwing codes! check there! Hard wiring the pump was quite common the plugs tended to give greif! The torque limit switch will cut the power almost exactly in 1/2! 15 psi boost max the engine should produce around 25-30 normally Edited August 26, 2016 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343665 Share on other sites More sharing options...
r686st Posted August 26, 2016 Author Share Posted August 26, 2016 No, fault lights are on and as far as I know there are no codes. I don't have a way to check for codes though. The engine is building the 25-30 pounds of boost. The truck has 4.17 rears and a 9 speed Eaton Fuller transmission. Once you "pop the button" it seems to get up better on the high side than what it pulls on the low side. Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343676 Share on other sites More sharing options...
mackrmodel686st Posted August 26, 2016 Share Posted August 26, 2016 It boils down to injectors, cam timing, bigger turbo, and computer programming. My boss had it done to one of our 350's and had it converted to a 427. It's expensive but can be done. It would almost be cheaper to find a used 427 and swap it out. Either way it's gonna cost you about 20 grand. As is, your truck has a good, reliable motor that will get decent fuel mileage, it's just gonna be a bit of a dog off the line, excuse the pun. Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343707 Share on other sites More sharing options...
r686st Posted August 27, 2016 Author Share Posted August 27, 2016 That isn't what I wanted to hear! Dang... What would be affected if I removed the rear of the pump where the governor is located and place a mechanical pedal, linkage and governor mechanism onto my existing pump? Which gauges/sensors/functions would be affected? Wouldn't this allow the truck to pickup better and blow some smoke? Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343732 Share on other sites More sharing options...
41180 Posted August 27, 2016 Share Posted August 27, 2016 We had a 93 superliner with a 400 electronic e7 . It was always a dog . We ended up downloading a 427 file and putting in bigger injectors and it woke it up. It had more power than our 95 western star with a 425 cat . Back in 01 when we did it it cost maybe 4 grand but everything has gone up so who knows. Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343735 Share on other sites More sharing options...
r686st Posted August 27, 2016 Author Share Posted August 27, 2016 Logtruckman... Did you get the file from Mack? Were the injectors aftermarket or from Mack? Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343751 Share on other sites More sharing options...
41180 Posted August 27, 2016 Share Posted August 27, 2016 Yeah actually though I think they put a new ecm for vmac2 and down loaded a file from someone else's truck that was a 427 and put the marine injectors as they called them . Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343753 Share on other sites More sharing options...
r686st Posted August 29, 2016 Author Share Posted August 29, 2016 Where is the torque limit switch? Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-343951 Share on other sites More sharing options...
fjh Posted September 2, 2016 Share Posted September 2, 2016 On The trans range cyl Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-344378 Share on other sites More sharing options...
r686st Posted September 7, 2016 Author Share Posted September 7, 2016 Can anyone tell me what the rail pressure should be on this unit? I took off today and it blew smoke the first few shifts and ran clean and did not have as much power. This is significant because I have never seen it blow black smoke like a mechanical Mack! What would cause the sudden smoke? Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-344916 Share on other sites More sharing options...
fjh Posted September 7, 2016 Share Posted September 7, 2016 They will run 15 -30 psi Quote Link to comment https://www.bigmacktrucks.com/topic/46589-vmac-1-injection-pump-diagram/#findComment-344934 Share on other sites More sharing options...
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