Jump to content
HybridZ

wont start after overhaul


Recommended Posts

ok i just did some work on this car. the work was already started when i got the car and i was told the car ran when the engine came out of the car but that it smoked and needed new piston rings. he did the piston rings and thats were i got the engine. work i have done...put a new timeing chain on the engine put everything back together and put the engine back in the car. i tryed to starte it and it wouldnt start. i checked spark and did have spark. i checked to see if the injectors were getting signal and they were not. i nerowed it sown to the thurmotime switch and just finished replaceing that now it is getting gas and everyonce in awile it pops and exaust comes out the tail pip (the pip is old and needs to be changed but im avoiding it till it runs if i can and to give you an idea of how bad the pipe is when it first started poping the exaust was brownish from rust). dose anyone have any idea what i should check or try next. i want my car to run. the pop is very soft and there is some (not much) exaust comeing out the tail pipe normal but very soft except every so often (i think its on cylider that dose something difrent) any ideas? thanks

Link to comment
Share on other sites

Guest 240hybrid

First is the car getting the fuel pressure it needs? I ran into a problem of getting to car to run for more than a few seconds, turned out I forgot to swap my pumps out for fuel injected one with 3 times the pressure. maybe the injectors need to be cleaned out also. good luck with it.

Link to comment
Share on other sites

thanks for the idea but thats not it this car is compleatly stock. nothing was changed on it. i guess it could be that the injectors need to be cleaned but it ran when they were taken off the engine so in theory it should run now im trying to think of anything that stayed on the car (the person i got the car from when he took the engine out of the car he took good care of it but not of the car twak.gif ) anything on the car sat outside in the weather for about a year. the exaust is my main suspect. i think im going to try takeing the muffler off and see if it will run with out it. if it were cloged could it cause this problem? there is some pressure comeing out the tail pipe but not much. i think it rusted up inside and is now cloged with gunk and rust dust.

Link to comment
Share on other sites

o also the fuel pump is working we checked that when the thurmotime switch was still broken and there was no signal to the coldstart or injectors. my first thought then was that the fuel pump isnt working. now there is gas getting into the cylender and there is spark but it wont start so i think ither the injectors are messed up and arnt makeing it misty or the exaust cant get out. or at least thats how i am thinking about it. any ideas would be a big help im at a loss other than my 2 ideas.

Link to comment
Share on other sites

Guest 240hybrid
:confused: It could be a stopped up muffler. how does the intake and filter look. both can be cause if clogged. also is your fuel filter clogged/not getting all air out of lines? old gas tanks are known to rust up if left sitting for time. only other ideas I got is timing or is your ecu or harness in working order and hooked up completely correct? Another major component that will piss you off is the Air Flow Meter on intake. if car was neglected and ecu/AFM was in it still could have gotten damaged. bonk.gif I know thats alot of different parts mention, but all these control/work with fuel injection. which it sound like a fuel or air problem.
Link to comment
Share on other sites

Guest 240hybrid

I was flipping through my 280z service manual, cause Im doing a fuel tanks swap and found troubleshoot page for "engine can not be started", it says just about everything you and I have mentioned. Majority of prob. listed are related to harness continuity, air flow meter, injectors, etc. one I found though is "relay"....it doesnt say which on though. frown.gif I've mentioned about everything I can think of. hope its not in your harness. hell to trace out if wires loose or cut. I'm not100% sure if you can do a diagnostics through the ecu/harness yourself. good luck with it.

Link to comment
Share on other sites

yea thats a good chunk of stuff to go over. ill have to start on it next time i go home. as for the fuel filter i replaced that. and i checked to make sure the fuel line had gas (that was fun sense i cant depresurize the system without the car runing)as for the intake it is clear and should be working good but i just read something else that gave me an idea i had the hose for the intake to the airflow meter just atached loosely and i just read that the way these air flow meters are is that they sometimes need a little pressure to work. so i will also try tightening that up. i think my main idea is that the exaust is cloged. i just hope to god that its not the computer its self.

Link to comment
Share on other sites

Are you working on a Z or a ZX; what year and what engine?

 

Does your car have a Catalytic Converter? If it does and your Cat.Coverter is stopped up-your exhuast will not flow freely. I'm not familiar w/the ZX's but some cars also have a Pre-Converter that can also become stopped up.

 

As for the starter, fuel & harness relays-it will depend on which year car we are talking about here.

 

Need to know what engine & year model car we are dealing with: and is the engine the correct engine for that car, or was it a transplant?

 

Kevin,

(Yea,Still an Inliner)

Link to comment
Share on other sites

Oops, looks like we left you to the wolves here. smile.gif

 

Sounds almost certainly like a timing issue to me, which is quite a common problem if you take the timing chain off, or distributor out. How extra careful were you when you did the timing chain to line up the bright links on the chain? Are your plug wires going to the correct cylindesr in the correct order? Is the distributor on the correct tooth? All this stuff can be checked with haynes manual procedures I am sure, but that is certainly what it sounds like to me.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...