Jeep xj 2.5 TD low on power.

[layback40]

Originally Posted by Chris 89

That's what I'm going to try.
As I don't fancy taking it of as it looks like a horrible job. Just waiting for some big plyers to be delivered so I can try and get them on it as it's such a pain to get on. The turbo feels good aswell.

Dont force the wastegate shaft, just try & move it gently a little first. If you disconnect the diaphragm, the arm on the shaft should move with finger pressure. It is just connected to a flap that covers the wastegate opening. Applying 25-30 psi to the diaphragm should make the wastegate shaft move. If it doesnt move easy, you have found your problem. Lots of WD40/CRC/Penatrine or some other lubricant is the best way to fix it. I use a mix of autotrans fluid & acetone for this sort of thing.

[Chris 89]

Have today put the car back together and now it won't start. Seems to be one thing after another. Only different thing I've done is blank the egr to the manifold. Could this cause it not to start? It tries to fire but won't. Am going to put some more diesel in it tomorrow incase it's to low as the car is on a bit of a slope. . just wasn't sure if it could be the egr blank as it was running until I done that.

[layback40]

Originally Posted by Chris 89

Have today put the car back together and now it won't start. Seems to be one thing after another. Only different thing I've done is blank the egr to the manifold. Could this cause it not to start? It tries to fire but won't. Am going to put some more diesel in it tomorrow incase it's to low as the car is on a bit of a slope. . just wasn't sure if it could be the egr blank as it was running until I done that.

If all you did was to blank the EGR off, then it will not have caused a no start.
Provided you have fuel bled. Best pump it at the filter.
A very small sniff of starter fluid may help.
Being a manual, they tow start well.

[amlav]

More likely fuel related . Maybe there is air in the fuel lines . If tank is empty or near empty it will take a bit of cranking for the ip pump to suck the fuel back up (after tank is filled up).
Also check the fuel filter if positioned corectly and no air seeps in to it .
Fuel return lines from injectors are rubber and can perish and allow air to seep back in the fuel line .

[Chris 89]

Unblanked it and it fired straight up. It would not go with it blanked . Very confusing. The turbo actuator moves at about 20 psi. Should it be moving before that? I have soaked it all in wd40 but it's still no better. Have driven the car and it's still the same. Have also checked the intercooler pipes and they are ok.

[layback40]

Originally Posted by Chris 89

Unblanked it and it fired straight up. It would not go with it blanked . Very confusing. The turbo actuator moves at about 20 psi. Should it be moving before that? I have soaked it all in wd40 but it's still no better. Have driven the car and it's still the same. Have also checked the intercooler pipes and they are ok.

I cant explain the EGR blank issue.
I have blanked 2 engines with no starting problems. Did you reconnect the vac line? If the EGR seals tight (unlikely with an older engine) You could plug the vac line that normally goes to it. I suspect some other change caused it not to start. Probably a fuel bleeding issue.
Does yours have a MAP sensor on the inlet manifold? If so it may need cleaning. Use sensor cleaner only. Dont brush it. If yours is a pre-update, it will have a MAF near the aircleaner, it may need cleaning with sensor cleaner.
When running, if you take the vac line of the EGR actuator, what happens?

20psi actuation is fine for turbo wastegate actuator.

If you disconnect the #1 injector sensor, does it run differently?

If you have a code reader, even if the check light is not on, check for codes.

[Chris 89]

I did bleed the system and it still wouldn't go. Yea I reconnected the little pipe to the egr. But as soon as I took that blank out it fired straight up. I drove it yesterday without the injector plugged in and I ran alright ticking over but didn't sound rite whilst driving it. And yep I've got the map sensor in the manifold.