Qavion 19 Posted November 21, 2015 Report Share Posted November 21, 2015 (edited) Ian, did you read this thread on IAC's and pintle shapes? Also, about the wastegate sticking. Sometimes this is due to the wastegate spindle bush migrating. In the following pic, the shiny part of the bush shows how much the bush has moved from it's normal position. Migrating bushes can either cause sticky valves or valves which don't close properly (as in the picture). I smacked the bush back into position, but it moved again, so I had it welded in position. I'm not sure if welding is the best solution if the holes can elongate (as suggested above). I think the bush might be hard to replace if it has been welded. Hope this helps Cheers Ian P.S. Does anyone know if Wastegate Solenoid (Frequency) Valves are still available. I see the part is now obsolete according to some sources (although SJSportscars still lists this item). Are there any alternate parts for this item? P/N A082M6420F Edited November 22, 2015 by Qavion P.S. Quote Link to post Share on other sites
Chillidoggy 4,384 Posted November 22, 2015 Author Report Share Posted November 22, 2015 Reference the IAC shapes, I have a 217-411 Delco, the cone of which is not pointed, it is flat. The only difference I can see is that the multiplug connector is orientated slightly differently to the one that was originally fitted to my car. It remains to be seen what, if any, difference that makes. Of course, I will post with the results, as it looks like I might get a run out today. This is the 217-411:- Reference the turbo bush, I'll have a look to see if I can see anything, Presumably if the wastegate capsule is not directly in line, it could cause the bush to wander out. As for the turbo wastegate solenoid, maybe you could have a look at the Delco 214-474. It's a 3-port solenoid, I was going to buy one to try, but just haven't gotten around to it. EDIT: also the U44001 Quote Margate Exotics. Link to post Share on other sites
Barrykearley 6,972 Posted November 22, 2015 Report Share Posted November 22, 2015 If the pintle doesn't fit exactly the hole it's meant to block off - it won't run right. just from my experience - the pintle is indeed critical Quote Only here once Link to post Share on other sites
Chillidoggy 4,384 Posted November 22, 2015 Author Report Share Posted November 22, 2015 1 hour ago, Barrykearley said: If the pintle doesn't fit exactly the hole it's meant to block off - it won't run right. just from my experience - the pintle is indeed critical I'm sure you're right. Started the car, started first turn of the key, despite it being colder than a witch's tit down here. Drove off, no probs, seemed OK, if a little high on the idle, which gradually started to settle down. After a couple of miles, I noticed it start faffing around, and finally it run, but wouldn't idle at all. Back home, I pulled the IAC valve, and this is what it looked like. The guts were left behind. Not surprised it was playing up, even if it was, or wasn't the right part. Here's the comparison, 217-411 at the top, the original IAC I removed at the bottom. Quote Margate Exotics. Link to post Share on other sites
Chillidoggy 4,384 Posted November 22, 2015 Author Report Share Posted November 22, 2015 Whilst I was cocking around, and after Jaap's post about bushes, I thought I'd check the turbo wastegate. It looked fine, but see if you can spot what is probably the cause of the turbo boost issue I've been experiencing: - Quote Margate Exotics. Link to post Share on other sites
andydclements 787 Posted November 22, 2015 Report Share Posted November 22, 2015 No washers on the wastegate spindle, leading to the split-pin locking to the capsule's arm? As well as the split in the pipe. Quote Link to post Share on other sites
lotus4s 24 Posted November 22, 2015 Report Share Posted November 22, 2015 That would be the split in the pressure line to the wastegate actuator... Quote 1995 S4s Link to post Share on other sites
Sparky 2,861 Posted November 22, 2015 Report Share Posted November 22, 2015 Next time I pop in, you'll be getting a slap. Quote British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland. And Shitfaced Silly Sod to Sweden. Link to post Share on other sites
Barrykearley 6,972 Posted November 22, 2015 Report Share Posted November 22, 2015 2 hours ago, ian29gte said: I'm sure you're right. Started the car, started first turn of the key, despite it being colder than a witch's tit down here. Drove off, no probs, seemed OK, if a little high on the idle, which gradually started to settle down. After a couple of miles, I noticed it start faffing around, and finally it run, but wouldn't idle at all. Back home, I pulled the IAC valve, and this is what it looked like. The guts were left behind. Not surprised it was playing up, even if it was, or wasn't the right part. Here's the comparison, 217-411 at the top, the original IAC I removed at the bottom. That's exactly what my one looked like - it is NOT a 217-411 unit. I'm not even convinced they ever fitted one of those to a lotus. when I fitted a 411 I had very similar results to what you experienced - seemed fine at first - then a whole lot of shit happened !!! put an order into rock auto - you'll have to wait a whole 5-6 days - but you will save yourself £50 !! Quote Only here once Link to post Share on other sites
Chillidoggy 4,384 Posted November 22, 2015 Author Report Share Posted November 22, 2015 Thanks Barry. I put the original one back in for now, arranged for a refund on the 411, and re-ordered a 427. Once I get the turbo pipework sorted I'll be able to drive it, but it could be a while yet. Quote Margate Exotics. Link to post Share on other sites
Qavion 19 Posted November 23, 2015 Report Share Posted November 23, 2015 No washers on the wastegate spindle, leading to the split-pin locking to the capsule's arm? As well as the split in the pipe. What split-pin? Seems to be missing Or did you mean the circlip locking to the capsule's arm? I notice on some installations, there are double lock nuts on the spindle. Not sure if it matters. Anyway, it sounds like we have a winner with the split pipe. A cheap fix.... sorta Well done! Cheers Ian. Quote Link to post Share on other sites
Chillidoggy 4,384 Posted November 23, 2015 Author Report Share Posted November 23, 2015 5 minutes ago, Qavion said: What split-pin? Seems to be missing Or did you mean the circlip locking to the capsule's arm? I notice on some installations, there are double lock nuts on the spindle. Not sure if it matters. Anyway, it sounds like we have a winner with the split pipe. A cheap fix.... sorta Well done! Cheers Ian. It remains to be seen, but I reckon that's it. I think there's a circlip on the wastegate spindle, too. The problem appears to have been caused by the fact that the turbo spigot is 6.5mm, but the wastegate solenoid port is 4mm. I guess what with the heat from the turbo, the rubber pipe just couldn't cope, despite the fact it was new. I've ordered a reducer so as not to strain them, and have two different pipe diameters ready to go on. Once that arrives, I'll know if it's cured. 16 hours ago, Sparky said: Next time I pop in, you'll be getting a slap. The way you've been carrying on lately, I should be safe until this time next year, by which time you'll have forgotten about it. Quote Margate Exotics. Link to post Share on other sites
fflyingdog 57 Posted November 23, 2015 Report Share Posted November 23, 2015 Looks like you may have found your culprit...................now for the test drive ! Quote Simplest things first. Link to post Share on other sites
Vanya 564 Posted November 23, 2015 Report Share Posted November 23, 2015 It's MOST LIKELY you've found the issue. Love it when its this simple. As for the IAC I agree with everyone else - if your IAC pintle is off, it'll run just straight out weird, especially when warm or during a warm start. Quote Vanya Stanisavljevic '91 Esprit SE | '97 XK8 Link to post Share on other sites
Chillidoggy 4,384 Posted November 24, 2015 Author Report Share Posted November 24, 2015 12 hours ago, Vanya said: It's MOST LIKELY you've found the issue. Love it when its this simple. As for the IAC I agree with everyone else - if your IAC pintle is off, it'll run just straight out weird, especially when warm or during a warm start. At the same time as I discovered the split pipe, I also found the aftermost air filter housing U-bracket missing. I initially blamed myself for not tightening it up properly, however closer inspection revealed that the rivnut or whatever fixing that the retaining bolt screws into in the GRP is nowhere to be seen, and hence the bracket, bolt washer and fixing are probably laying on the A299 Thanet Way somewhere, and there's bugger-all I could have done about it. It does however just go to show that regular inspections around your engine may not be a bad thing. 1 Quote Margate Exotics. Link to post Share on other sites
andydclements 787 Posted November 24, 2015 Report Share Posted November 24, 2015 On 23/11/2015, 08:06:13, Qavion said: What split-pin? Seems to be missing Or did you mean the circlip locking to the capsule's arm? I notice on some installations, there are double lock nuts on the spindle. Not sure if it matters. Anyway, it sounds like we have a winner with the split pipe. A cheap fix.... sorta Well done! Cheers Ian. Ah, hadn't opened the image up to enough resolution, it looked like a split pin that goes through the spindle, but zooming in, I can see it's a circlip/ E-clip. Mine is held by a splitpin and so have to fit shim washers either side of the arm so that the pin doesn't latch on to the arm and lock the wastegate position. Quote Link to post Share on other sites
Vanya 564 Posted November 24, 2015 Report Share Posted November 24, 2015 2 hours ago, ian29gte said: At the same time as I discovered the split pipe, I also found the aftermost air filter housing U-bracket missing. I initially blamed myself for not tightening it up properly, however closer inspection revealed that the rivnut or whatever fixing that the retaining bolt screws into in the GRP is nowhere to be seen, and hence the bracket, bolt washer and fixing are probably laying on the A299 Thanet Way somewhere, and there's bugger-all I could have done about it. It does however just go to show that regular inspections around your engine may not be a bad thing. Although the Esprit is quite a social creature - it will simply let you know if it feels like its not being shown enough attention (or money) by leaking fluids, busting gaskets, splitting hoses or similar. Each trip is an adventure. My last outing had me smoking when a few drops starting leaking from the Turbo oil-feed gasket..... Quote Vanya Stanisavljevic '91 Esprit SE | '97 XK8 Link to post Share on other sites
Popular Post Chillidoggy 4,384 Posted November 29, 2015 Author Popular Post Report Share Posted November 29, 2015 Update:- I fixed the turbo wastegate pipe using a reducing connector and two different pipe sizes so the problem doesn't happen again. I also fitted a new pair of Moroso coil packs at the same time., and refitted the original IAC for now. I'm pleased to say that performance has been restored, no faffing around on part-throttle and excessive boost. 4 Quote Margate Exotics. Link to post Share on other sites
Buddsy 1,642 Posted November 29, 2015 Report Share Posted November 29, 2015 Well done great result! Buddsy Quote "Belief is the enemy of knowing" - Crrow777 Link to post Share on other sites
Qavion 19 Posted November 29, 2015 Report Share Posted November 29, 2015 Whoohooo Quote Link to post Share on other sites
fjmuurling 66 Posted November 30, 2015 Report Share Posted November 30, 2015 Any special reason for using Moroso Coilpacks? Quote Esprit Freak Link to post Share on other sites
Chillidoggy 4,384 Posted November 30, 2015 Author Report Share Posted November 30, 2015 Only that they're a nice red colour, and they're supposed to have an improved performance output at the top end than stock, although I'm sceptical of American manufacturer's performance claims unless I see hard evidence. I don't imagine there will be any noticeable difference in performance for street use on the Esprit, and I certainly didn't notice any when I drove it yesterday. It's just part of my planned replacement of a lot of the peripheral 20-year old engine components which will give me a package of working spares, and I now have spare coil packs if I need them. Quote Margate Exotics. Link to post Share on other sites
Chillidoggy 4,384 Posted December 2, 2015 Author Report Share Posted December 2, 2015 Right, here's the 217-427 IAC, which has just arrived. I'm not hopeful, because it looks to me like there's a three-angle pintle on it. If you look at the original IAC, it doesn't have that as far as I can see. Proof will be when I fit it, and get to run the car. That might be Friday or Saturday. If it's not the right one Barry, you can have it! 1 Quote Margate Exotics. Link to post Share on other sites
Gold FFM Escape 797 Posted December 2, 2015 Gold FFM Report Share Posted December 2, 2015 Fingers crossed! Quote I have made many mistakes in my life. Buying a multiple Lotus is not one of them. Link to post Share on other sites
Chillidoggy 4,384 Posted December 5, 2015 Author Report Share Posted December 5, 2015 Fitted the new IAC this afternoon. The engine was a bit lumpy to start with, before settling down at a high idle, and it idled as it should after it got warmed up. I gave it a good testing on the road, and all seems well. This is odd, given the pintle shape difference. I'm a bit miffed that I'll never know if the 217-411 would have worked, what with it falling to pieces and all. I returned it for credit as faulty, at no charge to me, it's been accepted with no problems. So, now it'll soon be time to pull it all to pieces again for the next stages of refurbishment, including the new rad-pack and a shedload of other stuff. I shall probably be adding posts to my engine/gearbox thread in due course. Someone's going to get a good car when I sell it. Quote Margate Exotics. Link to post Share on other sites
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