Well i put the knock sensor back on but i grounded it to the IM, ill switch later see if it makes a difference. On the other hand I check the ECM for codes again and now its giving me: Bliiiiink, Bliiiiink and Bliiiiink, Bliiiiink again. What code is that lol?? Ill post a vid up tomo to show ya how it was doing it. Also would a high fuel pressure make the car miss fire and feel all sluggish and stuff??

no it souldnt cause the fpr would just return what it dont need. an if it is blinking like that it could be code 22 not sure tho lol. but how it run an you check compresson

Still miss fires and I took it for a test drive, it's turns off when I come to a stop. So I'm kind of starting to lean towards it being a electrical problem maybe??

compression??

Still got to check that, probably this coming Saturday...

I'm in the same boat as you right now. Can't figure out why it wont idle right. If you figure out, let me know and vice versa.

Well today I took the valve cover off to find the intake cam off by 2 teeth. So i fixed that and it idles just fine on 20BTDC. But when I drive it's sluggish under 2000rpms and also when I come to a stop it bogs down to 600-500rpm. So what do I do now, oh and I still got to check the compression... I'll do it this Thursday or Friday for sure!

Edit: I think i figured out why its sluggish under 2000rpms. I randomly started unplugging the injectors and only to find that the 4th injector didn't do shyt ! lol So ill replace that and see what happens then! Thanks Nico!!

Well after getting a new injector, i found out that it was a foul spark plug . So instead of just replacing one i replaced all of them. Then i also switched the ECU from #29 to #24, now it's not running rich, like before and doesn't miss fire like it did before. But when i step on the brake pedal the rpms drop from ~750 to 500. Also when i go to drive it, its sluggish just when its trying to start moving but then drives fine after that.

All post a video up of what im talking about this Wednesday. Oh and i forgot when i unplug the MAF is the car supposed to turn off?? Cause when i do unplug it just miss fires, like rpms jump up and down between 800 to 500...

Thanks in advance again nico for the help!!

with maf unpluged it will still run just crapy as hell

A high fuel pressure would force more fuel through the injectors everytime they opened.
I'd check the fuel pressure just in case.

it wouldnt if you fpr is working right i ran a 255lph pump on a na for a long time an it put out 80psi car ran great. if there is more prussere the fpr will open more a return more fuel,

No actually, raising the fuel pressure will increase the amount of fuel going through the injectors.
That's the reason why you even have an FPR in the first place, and is the same reason why FMU setups work.

A car with 80psi fuel pressure at idle would've ran extremely rich, normal is supposed to be 42psi at idle, you should recheck that gauge you tested with.

Alright nico, sorry for no video, the car runs fine now. But everytime I press the brake pedal the rpms drop from 750 to around 550. What could cause that also the timing is off by a little, I will fix that. But that wouldn't cause the brake pedal situation would it??

I would check the check-valve on the brake booster vacuum hose and the rest of the vacuum hose as well.

Just a quickie, does this spark plug mean its running lean or no:

Well i did a compression test today and i got the following results:
170
155
170
170

then i poured some oil in there and i got 195, ain't it kinda high lol. So what should i do now?? There's no smoke coming from the exhaust. Also theres a very little amount of oil leaking from right underneath the dizzy, could that mean the HG did not seat properly and be the reason for the low comp on piston #2?? So is it that or is it the rings?? Oh and the rings are new with new pistons.

From what I remember, if compression goes up from dropping in oil, it means the rings could be bad.

If you're not burning oil or coolant, I'd doubt you have a headgasket problem.

The sparkplug looks about right though.

yea thats not hg an stock compresson is 180 155 is not bad should run good an the o ring seal on the dizzy is going bad if its leaking there. do a leak down test that will help you tell where the compression is going.

Hey nico, if I put the rings in facing the wrong direction would that cause loss of compression?

Well I took the head off and put it back on already. But from the looks of things the piston was fine, so were the sleeves! When I put the head back I also did the 248/248 cam swap while I was there. Now the compression went from 155 to 140, checked it with half coolant and semi warmed up. I tinkled with the cams today to see if I was a tooth off and I wasn't. But I didn't get a chance to check the compression, I filled up the coolant and everything. But when I go to drive it miss fires under 2k rpms. Idk nico i want to get this running or this and the 89 s13 are going up for sale

Everytime something goes wrong, i tell myself im gonna sell the peice of s***.

Just like you dude, im still working on my diagnostics and havent found any solutions. I have a #28 ecu on my 91MT. So you said a number 24 helped you out a bit?

CTS13 wrote:Everytime something goes wrong, i tell myself im gonna sell the peice of s***.

Just like you dude, im still working on my diagnostics and havent found any solutions. I have a #28 ecu on my 91MT. So you said a number 24 helped you out a bit?

Yea the #28 ecu helped. Also on a side note does anyone know what the purple plug on IACV is for? Mines broke and the car miss fires when I tap the gas pedal quick and bogs to 500rpms when coming to a stop!

Well now I got the car running better no more miss fires! I bought a brand new iacv and put it on! Also I got a new minor issue, I got two amps hooked up! An alpine 360watt and a Jensen 300watt, and everytime I put the volume above 25 the rpms start to drop! Is it cause the two amps are sucking up too much power?

yep time to look for a bigger alternator.
or before that upgrade your major 3 wires.

mines is doing the same wen i throw out clutch it drops to 500 rpm and catches after a little and goes back to 900 i have no iacv and vaccum lines but they are not plugged due to having no lines on them at all..it also lacks power usually throwing in 2nd or 3rd for a few secounds and picks up were you having that same problem and should i clog vacum lines???

neverlift wrote:yep time to look for a bigger alternator.
or before that upgrade your major 3 wires.

Well actually i was going to get one big amp with a capacitor!

2ueceka24de wrote:mines is doing the same wen i throw out clutch it drops to 500 rpm and catches after a little and goes back to 900 i have no iacv and vaccum lines but they are not plugged due to having no lines on them at all..it also lacks power usually throwing in 2nd or 3rd for a few secounds and picks up were you having that same problem and should i clog vacum lines???

You should plug up the vacuum lines!

ok is that wat helped you? cuz there r none so ima take some cut lines off friends ka and plug them....so did that help yuour car when you were talking about that problem??

2ueceka24de wrote:ok is that wat helped you? cuz there r none so ima take some cut lines off friends ka and plug them....so did that help yuour car when you were talking about that problem??

Well actually I didn't have any problems with vacuum lines cause I plugged from the beginning! But when I had the problem, miss fire, I did spray maf cleaner on the lines to make sure! So the lines were good when plugged!

i plugged my vacumm lines 4 in the front and two in the back under intake my egr isnt plugged its not in the exhaust but is sitting there im having a problem with throwing my clutch in car falls to 500rpm and sometimes but will usually catch and sit around 700-900dies dont know what it is....did you go threw this prob or jus when hitting your brakes??

Yea, but your supposed to plug up the EGR! My car still does bog down when i apply the brakes but only down to 650ish and come back upto 750-800, ever since the new IACV and it used to drop down to 500 or below before! But now i have another problem lol. When my car is idling, and if i have my headlights on, and i open the door the rpms drop when the belts retract! But not when the lights aren't on! So is it a bad alternator or what?? Oh and I added three new grounds today too.