Ian J Posted January 16, 2023 Share Posted January 16, 2023 Hi folks, So; Defender 90 Wolf. 72,000kms. Engine starts immediately and runs well. Over the week-end we did close to 700kms on highway (100kph) and off road some low range and hard pulling a stuck vehicle. All is well except when going above 33% throttle and higher rpms (engine hot) I get lots of black exhaust smoke. I have checked air filter, intercooler and turbo elbows/hoses. Also EERG valve which seems ok but I have no idea how to test the electronics. Yes quite a bit of carbon build up in the intercooler to manifold line but (in my view) not enough to cause the smoke. Air outlet on the turbo is clean and very light oil residue so indicates turbo os ok (I can hear it spool up and down when driving). I understand its not uncommon for these engines to "blow" inlet manifold gaskets, but I cannot see any evidence of that. Any pointers very much appreciated. Cheers Ian Quote Link to comment Share on other sites More sharing options...
jenkinov Posted January 16, 2023 Share Posted January 16, 2023 The most likely cause is.air.flow ..you seem to have replaced the air filter .cleaned the erg valve .. Next area to look at is the maf sensor ..Curious has this been replaced ? Jenkinov Quote Link to comment Share on other sites More sharing options...
John F Posted January 16, 2023 Share Posted January 16, 2023 Thick black smoke would indicate excessive fuel / insufficient air so the MAF sensor is a good place to start, especially if this problem has just started all of a sudden.. Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 16, 2023 Author Share Posted January 16, 2023 Sorry guys, I should have been more specific, the Wolf is 300TDI diesel, so there is no MAF meter or sensor. Cheers Ian Quote Link to comment Share on other sites More sharing options...
7VHU Posted January 16, 2023 Share Posted January 16, 2023 Soft hose on inlet side of turbo? (If there is one) or on raised air inlet if fitted. Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 16, 2023 Author Share Posted January 16, 2023 Hi 7VHU, thanks for this. Inlet from air cleaner to turbo is the ribbed plastic unit and is in good condition, alas no raised air inlet. I am going to blank off the EGR and see it that has any impact. Cheers Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 19, 2023 Author Share Posted January 19, 2023 Hi folks, I have blanked off the EGR valve and with the tightening all the boost hoses things have improved somewhat. My question now, is, is it possible to remove the intercooler without removing the radiator? I'm thinking cleaning the intercooler, but to be fair these is no visible evidence if blockage when viewed through the outlet connection. Cheers Ian Quote Link to comment Share on other sites More sharing options...
john1950 Posted January 19, 2023 Share Posted January 19, 2023 Can you check the manifold boost pressure through the rev range. Is it fitted with a DPF filter? Are the fuel pump seals intact? Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 21, 2023 Author Share Posted January 21, 2023 I will endeavor to test the boost. The truck has a catalytic converter but don't know if it also includes a DPF. Setting seals are missing from the injection pump. Cheers Ian Quote Link to comment Share on other sites More sharing options...
john1950 Posted January 21, 2023 Share Posted January 21, 2023 (edited) If the seals are missing has someone been messing with the settings? If it has been black smoking a lot the cat's can clog up and restrict gas flow you can get a cat clean done. Unfortunately until you know if the fuel pump is set correctly it will be like fishing in the dark. Have any of the hoses delaminated internally? This may not show up until the rev's are high. Diesel engines do not have Catalytic convertors. This is a Ford evolution engine. Early engines had alignment problems with the timing belt, an upgrade kit should have been fitted to yours. As fitted the EGR system is problematic, and is very often by passed/ removed. Edited January 21, 2023 by john1950 Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted January 21, 2023 Share Posted January 21, 2023 Not sure about the 300TDI but diesels often have an oxidation catalytic converter in addition to a particulate filter. Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 21, 2023 Author Share Posted January 21, 2023 Hi Mike, I believe the Wolf is catalytic converter only. Cheers Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 21, 2023 Author Share Posted January 21, 2023 Usually with particulate filters there is a built in burn off process in the engine management system that burns off the soot. There is nothing like that in the Wolfs. Cheers Ian Quote Link to comment Share on other sites More sharing options...
john1950 Posted January 21, 2023 Share Posted January 21, 2023 There is supposed to be on the Transit, It does not work just wastes fuel. I have taken them off with a wedge of sooty tar at the front that would not shift with a soaking and pressure wash. You can see when it is over fuelling to do the burn off as the particulate filter chokes up you can see a small puff of black smoke. When I have removed the ceramic internal in the past the result is better fuel consumption and acceleration. Wolf engines stayed mechanical because of the possibility interference on the battlefield I think. Now everything is just about electronic. Quote Link to comment Share on other sites More sharing options...
Ian J Posted January 22, 2023 Author Share Posted January 22, 2023 Amen to that John. I believe the military turned down the TD5 in favor of the 300TDI as the TD5 was electronic comon rail and too difficult to service in the field. Quote Link to comment Share on other sites More sharing options...
john1950 Posted January 22, 2023 Share Posted January 22, 2023 They also eat head gaskets. 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.