# little things on the z **URL:** \ **Category:** Builds\ **Created:** [February 23, 2010, 12:00pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625 "2010-02-23T12:00:12Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![JDMSIR](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmsir/32/7376_2.png) [@JDMSIR](https://forums.speedlife.net/u/JDMSIR)\ **Post date:** [March 30, 2010, 7:59pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/41 "2010-03-30T19:59:41Z")
Awesome, I was confused for a second, thinking why are there two exhaust’s outs on the car. Awesome little project. When ya gonna drop it like its hot? ---
**Author:** ![dftsilvia](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dftsilvia/32/7447_2.png) [@dftsilvia](https://forums.speedlife.net/u/dftsilvia)\ **Post date:** [March 30, 2010, 8:06pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/42 "2010-03-30T20:06:02Z")
^ lol how come u took the turbo off?? ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [March 30, 2010, 8:06pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/43 "2010-03-30T20:06:49Z")
Needs more turbo, not less.:squintnono: ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [March 30, 2010, 8:26pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/44 "2010-03-30T20:26:03Z")
Turbo systems from the late 70’s are not very reliable. This one was not helping me with my runnability issues. The car runs fine when it’s cool, but when it’s all warmed up the car misfires and hesitates. The turbo itself had bad seals, so it was leaking oil pretty bad. I like it without the turbo, sounds way better. I just need to figure out what the issue is still. And I’m reconsidering lowering the car. I like it the way it is. ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [March 30, 2010, 9:14pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/45 "2010-03-30T21:14:34Z")
I’ve got an uncut engine wiring harness and ecu from a '77 I’d sell if you think that’s the problem. ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [March 30, 2010, 10:15pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/46 "2010-03-30T22:15:40Z")
I think it’s most likely an ignition problem somwhere along the line, I’ve replaced the distributor, thermotime switch, plugs, wires, cap & rotor, coil, fuel pump, and injectors. there’s still an issue. I wasn’t really throwing parts at the car though. the car is 33 years old and pretty much original, a lot of things needed replacing. I’ve tried the z forums, like hybridz and whatnot, but a lot of those guys seem to be stuck up and unwilling to help. I have the fuel injection troubleshooting guide for the car, I just need to find some time to go through everything and properly diagnose it. Edit: this is also a reason I pulled the turbo off the car, the fuel injection guide has no provisions for turbocharged cars. ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [March 31, 2010, 10:32am UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/47 "2010-03-31T10:32:24Z")
You pretty much nailed hybridz right there, there are a few knowledgeable people and a lot of dumb ones. I’ve got a good portion of the original EFI kicking around because I went megasquirt from the beginning, if you think you need something, let me know. ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [March 31, 2010, 12:57pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/48 "2010-03-31T12:57:25Z")
Any spare motors? Lol I did a compression test and 4 cylinders are at 115 psi another at 65 and another at 105 ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [March 31, 2010, 1:09pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/49 "2010-03-31T13:09:51Z")
No, sorry. Check the normal things like the cooling system being pressurized and the valve lash. Which one is low? ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [March 31, 2010, 1:39pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/50 "2010-03-31T13:39:21Z")
I think it’s most likely going to be the valve lash, I put a p90 cylinder head on the car last summer with arp studs. I should retorque the studs. The head was rebuilt but they might not have set the lash properly. It is only two cylinders that are low. ---------- Post added at 04:39 PM ---------- Previous post was at 04:38 PM ---------- Cylinder 5 is at 65, six is 105. ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [April 3, 2010, 5:02pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/51 "2010-04-03T17:02:47Z")
so I adjusted the valve lash, compression is up. but it doesn’t run anybetter. I’m just pullin at straws now, I have no clue what’s up. ---
**Author:** ![budsdubbin](https://avatars.discourse-cdn.com/v4/letter/b/d2c977/32.png) [@budsdubbin](https://forums.speedlife.net/u/budsdubbin)\ **Post date:** [April 4, 2010, 8:44am UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/52 "2010-04-04T08:44:42Z")
Put the old cylinder head back on. Obviously when you removed the turbo you reduced cylinder pressure. Once your done compression test with the old head back on. It should run a whole lot better but eventually you will have to replace some rings. ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [April 4, 2010, 6:34pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/53 "2010-04-04T18:34:10Z")
What harness/ecu does the car have? Turbo or N/A? What AFM? What mods were done to provide fuel under boost previously? What are the exact symptoms? It’ll probably run a bit odd with the p90 in n/a trim even if it has the n/a ecu/harness/afm. ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [April 4, 2010, 7:10pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/54 "2010-04-04T19:10:00Z")
It’s the stock na harness and AFM, the turbo setup used a Hobbs sworn to fool the car into thinking that the carvwas running cold when it was boosting. It was an original bae kit, maybe it’s just the cylinder head that’s messing things up. The car will cruise at 55 perfectly but getting there is usually a pain. The car will hesitate and backfire. If you’d like to check it out I’d be more than happy to let you drive it if you think you might be able to diagnose it ---
**Author:** ![Copper280z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/copper280z/32/5464_2.png) [@Copper280z](https://forums.speedlife.net/u/Copper280z)\ **Post date:** [April 4, 2010, 7:56pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/55 "2010-04-04T19:56:06Z")
I’m not too well versed in the factory efi, I’m just about out of ideas too. The last thing I can think of is the throttle position sensor(switch) on the TB, it’s got 3 positions, idle(lower contact), cruise(no contact), and acceleration(upper contact). It’s pretty straight forward when you take the cover off, make sure that the contact for acceleration isn’t stuck at the top. You could just megasquirt it…😉 ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [April 4, 2010, 8:07pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/56 "2010-04-04T20:07:32Z")
I’d almost rather run a set of triple webers, but I don’t have $1600 lol I should look at the tpa, I’ve been thinking about it but haven’t considered it as a Cause. Maybe even just cleaning it would help. Well see ---
**Author:** ![JDMSIR](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmsir/32/7376_2.png) [@JDMSIR](https://forums.speedlife.net/u/JDMSIR)\ **Post date:** [April 4, 2010, 8:16pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/57 "2010-04-04T20:16:39Z")
Just sell it to me as a shell. ---
**Author:** ![turbojohnny](https://avatars.discourse-cdn.com/v4/letter/t/df788c/32.png) [@turbojohnny](https://forums.speedlife.net/u/turbojohnny)\ **Post date:** [April 4, 2010, 8:46pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/58 "2010-04-04T20:46:06Z")
I don’t plan on ever selling this car ---
**Author:** ![JDMSIR](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmsir/32/7376_2.png) [@JDMSIR](https://forums.speedlife.net/u/JDMSIR)\ **Post date:** [April 4, 2010, 9:09pm UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/59 "2010-04-04T21:09:23Z")
> [@turbojohnny](#): > > I don’t plan on ever selling this car Hey I have said that before, had to try though. ---
**Author:** ![LUKE\_L](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/luke_l/32/7462_2.png) [@LUKE\_L](https://forums.speedlife.net/u/LUKE_L)\ **Post date:** [April 5, 2010, 3:46am UTC](https://forums.speedlife.net/t/little-things-on-the-z/79625/60 "2010-04-05T03:46:21Z")
Looks great :tup: Keep up the work. [Previous page](https://forums.speedlife.net/t/little-things-on-the-z/79625.md?page=2) [Next page](https://forums.speedlife.net/t/little-things-on-the-z/79625.md?page=4)