New pump and injectors / timing???

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Aug 19, 2009 | 12:18 AM

MandRServices1

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New pump and injectors / timing???

Hello all, haven't posted in a while, but still read as often as I can. Ok so here's the issue, its on the 93 in my sig its got 330000 miles now though. Ordered reman pump and injectors, got about 120000 out of the last ones, but I wasn't keeping up on the fuel additives, my fault.

So got everything installed finally, fired it and timed by ear with out the turbo on, wanted to make sure there was no problems before I put the turbo on, the factory ones are kinda a pain. Everything seemed fine, good throttle response, PS rattle under cold advance, so put the turbo on and test drove. Feels like I have no throttle until about half way to the floor, wont rev very high 2700 max under load, cant build over 4 psi of boost or get egt's over 500. Could this all be timing? was gonna try to retard it some after the test, but I decided to pass on the third degree burns. Will try retarding it tomorrow after work.

At first it seemed to be starving for fuel, thought maybe they gave me a na pump, but a 3rd gear take off from 10 mph rolled the biggest cloud of black smoke this truck has ever put out, but still egt's under 500. The other strange thing is when I start it, it will fire right off then stall unless I touch the accelerator. Also kinda the same deal, when I rev it and let off real quick it will almost die sounds like it drops down to about 300 rpm and then recovers. I'm gonna play with the timing tomorrow afternoon, but was just hoping maybe someone has had a similar experience.

Thanks in advance, I'm sure you all will come up with some good answers, you always do. Sorry about the long post

Mike

Aug 19, 2009 | 12:25 AM

rupejosh

Cargo Master

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From: back in SE Iowa

this is one for the daves.lol

Aug 19, 2009 | 08:16 AM

farmert

Lead Driver

Joined: Mar 2006

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From: western SD

Where did you get the pump from? It sounds like the governer is hanging up. I have heard that a couple of the on line rebuilders don't do a good job. Hope this isn't the case for you.

Aug 19, 2009 | 10:02 PM

Dave Sponaugle

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From: Nutter Fort, WV

That is exactly what I was thinking when you said won't rev past 2700 under load.

Something wrong with the govenor causing it to defuel the engine at higher RPM.

Aug 19, 2009 | 10:27 PM

MandRServices1

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Well tried the timing in about ten different spots this afternoon, no change in throttle response, boost or egt's. Called the pump builder (Pensacola diesel) and explained the issue, they suggested turning the fuel up 2 flats, figured alright maybe the tuned it too lean for the turbo, so put the timing back where it sounds the best and turned it up, no change. Still 4 psi of boost and 500 egt max. Not a big increase in smoke either.

So far Reman pumps are not impressing me, the last one I put on here (2 years ago) the FSS was bad when it arrived (MWFI). Thought i realy broke something, lol.

farmert & Dave S. thanks for the response. Was wondering if it could be the gov. Its hard to describe what it feels like when you drive it, it's almost like a really really bad turbo lag. Even mashing it too the floor in granny it will not slip the tires until about 2000 rpm, then it cuts out at about 2700 rpm. It will sure smoke like a train when you bog it though. But with no load it seems to rev just fine, up to about 3400 is as far as i would take it.

Think I'm gonna call them back tomorrow and see who I have to kill to get another pump sent out. if they agree will put the old one back on to make sure its not anything else. Was running fine before, other than a couple injectors bleeding over night, one hammering badly, and the pump not wanting to start when hot. But still pulled and was very snappy off the line.

If youall think of anything else plaese let me know, thanks again,

Mike

Aug 25, 2009 | 12:34 AM

MandRServices1

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Ok an update on the pump issue, put the old pump back on, runs good, so there gonna ship me a new pump this week. Gonna try to get them to tell me what they find wrong with the other one, just wanna know.

But atleast its driveable for now, still wont start when hot, and starts to develope misses as it warms up, dont think the old pump is happy about popping the 8 fresh injectors.

Hope pump comes soon, diesel is too expensive to leave it running all the time.

Aug 26, 2009 | 11:12 PM

MandRServices1

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Got to studying the pumps while I had them both off, noticed one little difference. If anyone could id the set screw in the pic's and knows what it does, and why one is set so much different than the other?

old pump