- i5oogt - Posted February 7, 2011 Share Posted February 7, 2011 hey guys I have a 1990 Isuzu Bighorn with the 4jb1t 2.8 turbo diesel motor. It had an issue last week where the starter motor solenoid jammed on basically cooking the starter motor and the wiring associated with it (caught fire) i have replaced the wiring and the starter motor. It now runs and goes well when cold. however when it gets to operating temperature it looses most of its power. you cant hear the turbo spinning up and it throws alot of black smoke out of the exhaust. im thinking it has cooked a sensor somewhere causing the wastegate to stay open? anyone have any ideas? cheers Karl Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 7, 2011 Share Posted February 7, 2011 these seem to breathe a lot of oil.. suggest you pull of the turbo outlet pipe and check that it's not all manked up. I'm pretty sure the wastegate on those is plumbed straight from the compressor cover so unlikely that there is anything controlling the w/g other than this air feed. the next thing i'd do is chuck in a cheap boost gauge and see if it's still making boost when hot. Have a quick look at www.clubisuzu.com (i think) and there will be some info on how to work some magic on the oil breather system. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted February 7, 2011 Share Posted February 7, 2011 only experience I've had is hooning round in nz new utes with this motor. and doing some parts for them. often the wastegates jam open on these. god knows why. other shit I've sen wont pertain to you as import motors are belt driven rather than gear. injectors like to pack a sad causing misses and smoke at idle. aside of that they're sweet shouldn't be much electricery on them. if it's still running EGT, make a shim to go under the valve which blocks the pipe. that could also be a cause (quite common) also check for frostplugs missing from the manifold. we had a couple of 3 litre ones at work that kept popping them out hah. Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 7, 2011 Share Posted February 7, 2011 Oh Yeah.. forgot about the EGR mod that sure gave it some more poke.... Quote Link to comment Share on other sites More sharing options...
- i5oogt - Posted February 7, 2011 Author Share Posted February 7, 2011 I threw a brand new turbo on it 6-8 months ago and cleaned all the lines etc out then at the same time i put the 4jb2t oil return line from the rocker cover back down into the sump to clear any excess oil build up in the head. I will put a boost gauge in and see if the turbo is doing anything. has near new glow plugs and injectors. It is still running the EGT crap I haven't removed it yet. I was thinking that something associated with it might be causing the problem as the fire was on that side of the engine. all the vacuum hoses are looking tired and a little cracked etc so it will be a good opportunity to get rid of it. I will try that tomorrow after work and report back cheers Karl Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted February 7, 2011 Share Posted February 7, 2011 yeah it's probably fried the EGR wiring Quote Link to comment Share on other sites More sharing options...
- i5oogt - Posted February 8, 2011 Author Share Posted February 8, 2011 removed EGR Crap and cut some plates to cover the holes up. everything appears to be working as it should now. and it is noticeably quicker too so Isuzu = clocked (well until the next thing goes wrong) thanks for your help guys Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted February 8, 2011 Share Posted February 8, 2011 choiiiiiice most cunts leave the valves and shit there. I gues since your probably has the full mechanical (win) inejctor pump stz it'll be sweet without. some of the 3.1 pack a sad if you remove the egr electricery. choice that it goes sweet. celebrate with more fuel + welded shut wastegate Quote Link to comment Share on other sites More sharing options...
avengertiger Posted February 13, 2011 Share Posted February 13, 2011 i have all that egr crap on mine to any pics of what you did i might get rid of mine to!! do they smoke test diesels over here yet? also i have a broken engine mount driver side anyone changed one insitu before looks a proper bollix??? sorry for thread hijack Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 13, 2011 Share Posted February 13, 2011 Just unbolt the 2 EGR thingees from the inlet manifold and make up some thin aluminium "gaskets" which do not have any holes in them for the exhaust gas to go through. Unsure on your other questions.. Quote Link to comment Share on other sites More sharing options...
- i5oogt - Posted February 14, 2011 Author Share Posted February 14, 2011 I will take some pics in the next couple of days to show what I removed Quote Link to comment Share on other sites More sharing options...
avengertiger Posted February 16, 2011 Share Posted February 16, 2011 cool and ye the mount can be done in situ as tyrone (the getaway driver in snatch) says its a bit tight!!!! slip of the two bolts holding mount the subframe and two bolts on top holding to steel engine mount,jack the engine up on that side and the mount should slide out (just) with a bit of wiggling. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.