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DRiFTT
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Discussion Starter · #1 ·
Ok, the other day i drove my car, and it was on almost all day. its a cressida with a 1jz-gte motor, automatic. Now, when i was ready to drive home, i wanted to run this turbo civic but instead, normally when i mash the gas all teh way, i fly back in my seat and boost goes up full at 8.5psi(yea its set low) but when i did mash, i saw the boost up there but no force, it started running like shit, like somethings sticking or the diff spinnign free, more N/A feeling like. :(

So yesterday i decided to go get some new plugs, did'nt get it, so i took out the old ones and the tips and stuff was black, used this thingy to clean it and they got clean enough, so i put them back and the car started pulling how it was to with 8.5psi, lots of pushing back in the seat, yay.

But after a few minutes, it'll start back feeling N/A with boost going up and the car holding back.

**Also, when i checked, two of the connectors on the coilpacks was loose, one was'nt so loose but it clips on the coilpack connector properly, now the other one, the clip inside it was not there, so i just pushed it in like normal hoping it touches the pins in the coilpack connector.i also used silicone so it does'nt move and go off place, but i dont think its doing anything**

Now yesterday i decided to put new plugs, so i got NGK BKR7E for the time as i was low on money and the guy has a 2jz-gte supra and he said he uses them and it works great and should work on my 1jz without regapping. So after i put it, car starts normal, i take it out for a test and its running even BETTER THAN BEFORE at 8.5psi. Now, when i go for another drive around, i start to hear some slight missing every 7-8 seconds on idle, and if i rev slow,sometimes it'll miss up till 2800rpm and stop after that. Also the boost builds and it feels lazy at times, like N/A again.

Im going to solder on the connector to the pins on the coilpacks to see if thats the problem today and i hope it is so i can drive happy.

But does anyone know what is happening?

i just got back my car from the mechanic like 2weeks now and this is happening. Im hoping its not the tranny slipping bcuz i seeing hell to find a 5speed manual transmission down here in trinidad and i dont know about the 6speed from teh 2jz if it will work :(.
 

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2,132 Posts
low rpm miss = plugs gapped too small
high rpm miss = plugs not gapped low enough
black soot on plug = running rich
white soot on plug = running lean
inconsistent miss (but under boost) = not enough spark current (get a better ignition system)

easy spark plug diagnosis!

if it is diagnosed as running rich then check O2 sensors... also scan the car and check in the banks named STFT and LTFT (these are your fuel trims) if there is too much fuel trim... then its a def o2 sensor or injector issue

if it keeps missing with the new plugs at all gaps... there is either a short, or some part of your ignition system is worn... remove a plug from the car (while its still hooked up to the ignition)... crank the car and check for spark

hope this helps!
 
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what if it feels like it miss's like dies for a second then kicks in, but does it when you stomp on it high or low rpm's, and only happends very rarely? what could be the problem then, im thinking jsut bad plugs
 

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Republican
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Do not double post.
 

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DRiFTT
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991 Posts
Discussion Starter · #6 ·
hksguy16, thats how mines is.....but i think my problem might be the bad connectors on the coilpacks.....going to solder them on today and silicone it for safety until i can order new connectors from toyota.
 

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hksguy16 said:
what if it feels like it miss's like dies for a second then kicks in, but does it when you stomp on it high or low rpm's, and only happends very rarely? what could be the problem then, im thinking jsut bad plugs
if its all the time it could be connections.... if its an idle issue it may even be a fuel trim lean spot...

get the car scan tooled, and drive it around... the diagnosis will be easier
 

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DRiFTT
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991 Posts
Discussion Starter · #8 ·
fuel is my problem,pump not pumping good enough
 
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