I was at the quarter mile with car and went from third to neutral instead of 4th. The car bounced of the rev limiter pretty hard. When I pulled in the pit area I noticed that the exhaust tone sounds different and the car idled rough. The chack engine light came on. I got the codes on it..71-74...or random misfiring. I talked to somebody and they told me my plugs may be messed up, so I changed them today, the #3 plug fas fauled out after that the cel went off, but then later it came back with the same rough and shaky idle. Im coming to a conclution that my #3 fuel injector is messed up because when i disconnect the connector nothing happens to the engine rpm, its like theres nothing there. But when I pull any other injector connector the car dies down. Does anybody have any advise...

P.S.
I also listened to my valve train with the screwdriver trick, everything sounds fine.

 

Did you just hit the rev limiter in neutral?

Or did you actually put it into a gear and overrev it, above the fuel cut/rev limit?

 

No just neutral.

 

Do a leakdown test to check for bent valves

 

Thanks Ill do that as soon as possible

 

Sounds like bent exhaust valves to me. Good luck! Let us know what you find.

 

Is that a major job to perform if I did bend the exhaust valves?

 

Depends on your definition of major. The head has to come off.


Modified by b19coupe at 10:45 PM 5/6/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like bent exhaust valves to me. Good luck! Let us know what you find.</TD></TR></TABLE>

dito

 

i dont see how u can hurt anything by just boucing off the rev limiter in neutral. thats the whole reason it is there, so u dont **** up ur engine

 

where are you located. its a long shot but if your around me, i got a valve spring compr. if you decide to check the valves and they are bent, we can pull them and put new ones. save ya lots of money. i am in NC BTW..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Buckshot &raquo;</TD></TR><TR><TD CLASS="quote">i dont see how u can hurt anything by just boucing off the rev limiter in neutral. thats the whole reason it is there, so u dont **** up ur engine</TD></TR></TABLE>

if he hit rev limiter, he could have not overreved, this must be related to sometning else.. i've done that many times and few times with raised rev limiter to 9K, i only hit the rev limiter once at 9K,

i'd think you should hit rev limiter in neutral therefore you can overrev..

 

check fuses and injectors.

 

Do a compression test, that should give you a good indication of whether you bent valves or not.

 

sounds like a bent valve

 

What's the screw driver trick? Curious.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">What's the screw driver trick? Curious.</TD></TR></TABLE>

You use the screwdriver somewhat as a sound telescope, helps magnify the sound underneith the valve cover. Put your ear near the end of the screw driver... at least, thats how I understand it works.

 

Im located in New York, but thanks for the help. I though that a bent valve would make a noice that I would hear with the screw driver??

 

How about your distributor??

Check to see if you have spark coming from that plug.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00itr456 &raquo;</TD></TR><TR><TD CLASS="quote">I was at the quarter mile with car and went from third to neutral instead of 4th. The car bounced of the rev limiter pretty hard. When I pulled in the pit area I noticed that the exhaust tone sounds different and the car idled rough. The chack engine light came on. I got the codes on it..71-74...or random misfiring.</TD></TR></TABLE>

You have bent valves.

The only way you could have bent your valves was if you shifted from 3rd to 2nd. You cannot overrev the motor in neutral, the rev-limiter will prevent you from doing so.

You need to pull the head and replace the bent valves (which means your head will have to go to a machine shop).

 

valves or knock sensor went out which is rare, but who knows!!!

 

Why would I have to go to a machine shop to put valves in?

 

You don't just install valves and call it a day. The seats should be machined and the valves lapped in so that you get a good seal. You might as well have a complete valve job done while the head is off, that way your engine will perform it's best. Just don't miss any more shifts