Installed new plugs yesterday now car chokes upon start up
#1
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Installed new plugs yesterday now car chokes upon start up
hey guys, I had my mechanic install NWP spacers and OEM sparkplugs yesterday. Im almost 100% sure the spacers have nothing to do with this problem. Anyway...the car chokes when I start it now, kind of like its not getting enough fuel. Eventually it starts though, it never dies. Sometimes it chokes and sometimes it starts fine. I left the car overnight and it started just fine, but after shorter trips it seems to choke when I start the car again.
Any idea what the problem is? thanks in advance
Any idea what the problem is? thanks in advance
#2
hey guys, I had my mechanic install NWP spacers and OEM sparkplugs yesterday. Im almost 100% sure the spacers have nothing to do with this problem. Anyway...the car chokes when I start it now, kind of like its not getting enough fuel. Eventually it starts though, it never dies. Sometimes it chokes and sometimes it starts fine. I left the car overnight and it started just fine, but after shorter trips it seems to choke when I start the car again.
Any idea what the problem is? thanks in advance
Any idea what the problem is? thanks in advance
#4
Is it when the engine turns over, revs to like 600-700rpm then *slowly* starts and revs to normal ~1,300rpm and then idle smooth afterwords? Only when engine is warm?
That's what I get once in a blue moon but the car drives fine, and still does start every time.
That's what I get once in a blue moon but the car drives fine, and still does start every time.
#6
Ya only happens after short trips and engine is warm. When it has cooled down it starts up no problem, I never figured out what it was and didn't pursue it since it wasn't a big deal as my car still start every time on 3rd crank.
#14
I'm sure you did this but check all the electrical and vacuum connections around the manifold and runners. There are a lot of connections that have to be undone for this job. Also, check the other end of each connection. It's possible to miss undoing one and yank on it while removing the runners. The mechanic could have damaged a clip or vacuum connection somewhere less obvious than right on top.
#16
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I would try the ECU reset. You've got nothing to loose. It's a lot easier with a watch that shows seconds.
I'm sure you did this but check all the electrical and vacuum connections around the manifold and runners. There are a lot of connections that have to be undone for this job. Also, check the other end of each connection. It's possible to miss undoing one and yank on it while removing the runners. The mechanic could have damaged a clip or vacuum connection somewhere less obvious than right on top.
I'm sure you did this but check all the electrical and vacuum connections around the manifold and runners. There are a lot of connections that have to be undone for this job. Also, check the other end of each connection. It's possible to miss undoing one and yank on it while removing the runners. The mechanic could have damaged a clip or vacuum connection somewhere less obvious than right on top.
ah...you may have a point. I thought oem plugs all come gapped to proper specifications so I didnt even bother
#18
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So I found out exactly when this happens.
Cold starts are perfect. However, warm-starts, when I restart the car after 5-10 minutes, is when it sounds like its going to die upon starting.
Cold starts are perfect. However, warm-starts, when I restart the car after 5-10 minutes, is when it sounds like its going to die upon starting.
#20
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does anyone else have any input? Is this a normal characteristic of spacers? If so, its fine b/c it means its normal. But if other people dont have this warm-start issue (other than n3985), I would still be worried.
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I'll make you hear it at the meet on saturday. We went over the install today and everything looks good. NO idea whats up Why do some (you and me) have the problem and others dont?
#30
I randomly, but rarely have the issue. Mine sounds a lot more relaxed than this guys. It stutters for a bit once it fires, but then idles up just fine. But since it's also rare and random, it doesn't fit his problem haha. I have a breather on the front valve cover, so maybe that makes a difference. I also have 1 step colder NGK iridiums.
#31
I had the EXACT same problem with mine right after plugs.. I took i.m back up.. checked all the plugs(all were gapped) and then put everything back on the exact same way... and was fine... Idk wth I did wrong the first time.. Maybe our cars just don't like us? It's a hastle I know.. But before buying anything spend 45 min and just take ur im back off and re check everything.
#32
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well Im convinced it was a problem with the spacer install....way too much rtv was applied. You can actually see the dried up rtv oozing out of the spacers right now. Aaron said its blocking the flow of the injectors. So..the shop is going to re-do the install on sunday. I'll report back then.
#33
well Im convinced it was a problem with the spacer install....way too much rtv was applied. You can actually see the dried up rtv oozing out of the spacers right now. Aaron said its blocking the flow of the injectors. So..the shop is going to re-do the install on sunday. I'll report back then.
#34
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Makes total sense....could this be the reason for the choking upon warm-starts?
#35
"the volume has increased in the intake manifold and the computer doesnt see the extra space... it only see;s what is passing the mass air flow.... and it take more fuel to start the car... and that hesitation is a lean condition"
Makes total sense....could this be the reason for the choking upon warm-starts?
Makes total sense....could this be the reason for the choking upon warm-starts?
#37
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But how come not everyone's does it like yours? (just saying). It makes sense, but everyone's car should react pretty much identically on start-up (and they don't). I still say too much rtv b/c even I have way too much and I was smearing it thin. I'm going to redo it when the turbo goes on.
+1 on the turbo
well its going to be re-done on sunday and this time the rtv will be applied more conservatively...I really hope that solves the problem. but again, I dont see how rtv would cause a temperature related issue.
#39
you are having this problem because your mechanic disconnected the throttle body when he did the plugs instead of just flipping the TB to the side and not disconected the harness.
Now you need a idle air volume relearn and you are good to go
Now you need a idle air volume relearn and you are good to go