# Lurching at high RPM **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [June 15, 2006, 4:04pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945 "2006-06-15T16:04:36Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 15, 2006, 4:04pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/1 "2006-06-15T16:04:36Z")
On hotter days, right when my turbo should start spinning, I get a violent lurching/jerking/stuttering motion. Cold days, it’ll do it about .5-1 second after I hear my turbo start. I’ve also noticed that my fuel pump has started to whine a bit. Think that could be the problem? 1989 180sx SR20DET Any suggestions would be great. ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 15, 2006, 8:06pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/2 "2006-06-15T20:06:49Z")
Update. Lurching has pretty much stopped, but now I’m getting zero boost from my turbo. I can still hear it spinning but there is no increase in power at all. Any ideas? ---
**Author:** ![apex\_drifter](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@apex\_drifter](https://forums.speedlife.net/u/apex_drifter)\ **Post date:** [June 15, 2006, 8:09pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/3 "2006-06-15T20:09:50Z")
Check ur vacuum lines? ---
**Author:** ![beatshack](https://avatars.discourse-cdn.com/v4/letter/b/f0a364/32.png) [@beatshack](https://forums.speedlife.net/u/beatshack)\ **Post date:** [June 15, 2006, 11:19pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/4 "2006-06-15T23:19:30Z")
the lurching you described, does it feel like your power hits a brick wall for a second? might be fuel cut (injectors hit max duty and ecu cuts fuel and spark completely to avoid running lean and melting a piston). ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 16, 2006, 1:49am UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/5 "2006-06-16T01:49:39Z")
I checked all the lines that I could see, and everything looked fine to me, but I’m far from a mechanic. And it does feel like the power hitting a brick wall, but not just for a second. The only way I can start accelerating again when it happens is shifting. ---
**Author:** ![imported\_nismo1](https://avatars.discourse-cdn.com/v4/letter/i/76d3ee/32.png) [@imported\_nismo1](https://forums.speedlife.net/u/imported_nismo1)\ **Post date:** [June 16, 2006, 6:47am UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/6 "2006-06-16T06:47:22Z")
sounds like u have exhaust leeak ---
**Author:** ![beatshack](https://avatars.discourse-cdn.com/v4/letter/b/f0a364/32.png) [@beatshack](https://forums.speedlife.net/u/beatshack)\ **Post date:** [June 16, 2006, 11:12am UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/7 "2006-06-16T11:12:40Z")
> [@Fergy](#): > > I checked all the lines that I could see, and everything looked fine to me, but I’m far from a mechanic. > > And it does feel like the power hitting a brick wall, but not just for a second. The only way I can start accelerating again when it happens is shifting. that sounds a lot like fuel cut… which usually only happens if you’re boosting too much, or have a huge boost leak causing you to run ultra-rich past the point the injectors can supply. have you done a boost leak test on it? its a good thing to do even if it isn’t the source of the problem. you can make a tester with about 10 dollars in parts from RONA and a tire valve from canadian tire. you strap this onto the turbo inlet and hook up an air compressor or bike pump and start pumping. listen for hisses, and/or spray soapy water (windex etc works) on every possible leak point. ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 16, 2006, 1:45pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/8 "2006-06-16T13:45:34Z")
I can’t see the picture but I googled it and I think I’ve got the idea. Is it better to detach the pipe from the inlet and just test directly on the turbo or does it matter? ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [June 16, 2006, 2:18pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/9 "2006-06-16T14:18:55Z")
> [@Fergy](#): > > I can’t see the picture but I googled it and I think I’ve got the idea. Is it better to detach the pipe from the inlet and just test directly on the turbo or does it matter? I made one and attached it directly to the compressor inlet. ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 16, 2006, 2:45pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/10 "2006-06-16T14:45:19Z")
Ok the picture’s working for me now. When I googled it I found one that attached a pressure gauge to a second gutted valve stem from the cap. From the tutorial I think it was just to determine whether it was working or not. I’m guessing that as long as you build the tester right and attach it securely it isn’t really necessary though is it? [http://www.honda-acura.net/forums/showthread.php?p=2243455#post2243455](http://www.honda-acura.net/forums/showthread.php?p=2243455#post2243455) This was the tutorial thing I found. ---
**Author:** ![beatshack](https://avatars.discourse-cdn.com/v4/letter/b/f0a364/32.png) [@beatshack](https://forums.speedlife.net/u/beatshack)\ **Post date:** [June 17, 2006, 9:37pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/11 "2006-06-17T21:37:43Z")
yeah, you want to put it directly on the turbo inlet. ---
**Author:** ![mini\_me1209](https://avatars.discourse-cdn.com/v4/letter/m/7bcc69/32.png) [@mini\_me1209](https://forums.speedlife.net/u/mini_me1209)\ **Post date:** [June 17, 2006, 10:13pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/12 "2006-06-17T22:13:29Z")
Although the pressure gauge isnt neccesary, it is helpful in making sure you dont over pressurize the system. ---
**Author:** ![jdms13rhd](https://avatars.discourse-cdn.com/v4/letter/j/f05b48/32.png) [@jdms13rhd](https://forums.speedlife.net/u/jdms13rhd)\ **Post date:** [June 18, 2006, 4:26pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/13 "2006-06-18T16:26:49Z")
dont have to worrie about over pressuring the system. Max would be like 25 lbs and piped can take much more than that. Your problem sounds like your actuator clip fell off the ex side of your turbo and its just not actuating. Its the rod deal, you cant miss it! Give that a cheak! ---
**Author:** ![beatshack](https://avatars.discourse-cdn.com/v4/letter/b/f0a364/32.png) [@beatshack](https://forums.speedlife.net/u/beatshack)\ **Post date:** [June 23, 2006, 12:11am UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/14 "2006-06-23T00:11:37Z")
> [@mini\_me1209](#): > > Although the pressure gauge isnt neccesary, it is helpful in making sure you dont over pressurize the system. you can just have someone look at the boost gauge… assuming there is one ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [June 23, 2006, 6:03am UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/15 "2006-06-23T06:03:19Z")
> [@beatshack](#): > > [quote=mini\_me1209]Although the pressure gauge isnt neccesary, it is helpful in making sure you dont over pressurize the system. you can just have someone look at the boost gauge… assuming there is one[/quote] Unless you have the throttle body open you will not see a reading on the guage. ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 23, 2006, 3:51pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/16 "2006-06-23T15:51:24Z")
No boost gauge anyways. Buuut I did another look over to see if there was anything visible and it looks like my fan got a bit too close to one of my hoses (the one feeding into the engine) and there’s a nice slice in it. Any ideas where to get a replacement? ---
**Author:** ![Fergy](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@Fergy](https://forums.speedlife.net/u/Fergy)\ **Post date:** [June 24, 2006, 2:51pm UTC](https://forums.speedlife.net/t/lurching-at-high-rpm/142945/17 "2006-06-24T14:51:03Z")
Question about that hose… Right after I found the hole I took it to NAPA to try and get a replacement, and they said I’d have to go straight through the dealer for it. Is that true? Wouldn’t I just need a hose rated for the kind of pressure it needs to take? I have no idea how much pressure that is though…