Steveastrouk
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NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Does that need to be a dealer ? Or can it be done from a generic OBD ? -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Just to finish this thread. After consulting with a very wise and ancient mechanic who took one look at the OBD codes and said "Lambda probes" I gave in, and bought my son a set of 4 generics for Xmas. I also straightened out some tiddle-poor crimping of wires on his recently replaced fuel pump while I was at it. Had to cut one of the probes out, and make a new mount in the downstram pipe for the passenger (NAS spec) side. Car is runnng like a champ now. Idle is still a little too high, but the car has only been run at length for a couple of times. I assume it needs a few more before the ECU will settle again. Learned a lot from you guys in this thread, I appreciate all your comments. Steve -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Will try that in the morning. It also occurred to me, that given him rolling the bloody thing, I don't know if the plenum has crud in it too. -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Not vacuum leaks, blew something nice and volatile at it, didn't twitch except when I blew a sniff in the inlet itself. Airbox and environs on the list to look at tomorrow. No sign of the throttle linkage sticking or anything simple -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
CLEVER ! Thanks guys. We're about to get whacked by the tail end of that hurricane Isias tonight, so that's a tomorrow project, weather permitting. -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Engine DIDN'T run upside down Steve -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
THAT'S an interesting idea. Are there are procedures for vacuum leak testing - I've vacuum bled brakes, but I have never looked engine systems and vacuum, Thanks guys -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Also, I notice the thing has a VERY high idle, in Park - like 2800 RPM. Could that be a symptom ? -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
So dad (me) finally got to drive the thing extensively today - another suggestion received elsewhere was a glitchy VSS, so I removed that for a try out, and still no dice. What I experienced with it though wasn't "loss of power", I had outright misfiring. Bringing the car to the side of the road, and idling it doesn't return the power. Switch off, and immediately restart - bang, we're off again. I'll clear the codes on the OBD and try tomorrow. Thanks for all the ideas, I'm still leaning to the fuel pump, going to underneath and look at all the wiring tomorrow. -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Going to go under it and explore tomorrow. What gets me is that it is instantly fixed by turning off the ignition. I need to wiggle nothing to make it work. Shorts are entirely possible. -
NAS spec 4.0 loses power then it comes back on restart
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
He did both fuel filters for sure. Oil looks OK, Battery is still nicely tied in. Checked the ECU wires too. Air filter needed changing, that was done. I think its the intermittency that gets me. Driving it back, we had a couple of hours with nothing, then not more than 20 minutes of driving between issues. It might've correlated very very slightly with the level of fuel in the tank, I don't know. <edited> Now he adds that JUST before he had the rollover that he had one episode of this, so that event might not have been the trigger. Sorry, wasn't aware of that earlier. There was a lot of oil in the filter after the roll. Would O2 sensor failures give us an issue like this. -
Hi My son rolled his pride and joy, his 1997 Disco 1 NAS spec 4.0 while recovering the car from a desert track where he'd had to replace a draglink in the field. He let it sit for a few days for everyhing to drain back into the right places, then was forced to leave his school because of Covid and come home. On the 2000 mile return trip he kept getting weird powerlosses, which we couldn't resolve, they didn't correlate with hills, high speeds or anything else. He was in such a bad state, his mum and I drove out 500 miles to meet up with him and help. I experienced the same thing as he did. The weird thing here is that when we pull off the road, turn off the ignition and IMMEDIATELY turn it back again, the damned thing purrs like a kitten and we're on our way. NOW, full discloseure, fairly recently he'd burned out his fuel pump (student cash flow crisis- ran it dry) and replaced it with an after market pump. I'm still seeing decent rail pressures, and no leakback when the ignition is off, but we have that as a contender. Next, the local autostore ran the OBD on it, and we get P0451 and P1316 - I'm very suspicious of P0451 - fuel pressure sensor fault. Would that give us the symptoms ? There are defintely wire issues back there. Thanks for any input you can give us. Steve
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4L SFI NAS Spec Disco 1 V8 won't start....sometimes.
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
I took the box to work, and reflowed the whole thing in our special ovens, but it hasn't fixed the problem. -
4L SFI NAS Spec Disco 1 V8 won't start....sometimes.
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
No, this is a NAS spec Disco, with the GEMS 4.0 engine. -
4L SFI NAS Spec Disco 1 V8 won't start....sometimes.
Steveastrouk replied to Steveastrouk's topic in Discovery Forum
Ah well, It wasn't the power. We can make it work always, if we disconnect the alarm box completely for 10 minutes. Does that give anyone any ideas, because I'm out of them.