My 1990 DA runs like it has a cam in it,but it is all stock. the timing is rite and all the vacume lines a all rite.plugs and wires are all new, had bad valves so i changed the head. still running like **** can figure it out! need help asap have to make a trip to florida from NY next week.

 

is it just a rough idle? that could be all kinds of problems

could be the pcv valve bad (check it with motor running and pinch the line, if you hear it click it works)

any codes? check the ecu for flashing with key on engine off

hows plug condition?

hows the plug wires? how long since they've been replaced? same with cap and rotor...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ToNY2012 &raquo;</TD></TR><TR><TD CLASS="quote">My 1990 DA runs like it has a cam in it,but it is all stock. the timing is rite and all the vacume lines a all rite.plugs and wires are all new, had bad valves so i changed the head. still running like **** can figure it out! need help asap have to make a trip to florida from NY next week. </TD></TR></TABLE>

You should do a compression check, and leakdown test to make sure its not the internals of the engine, since you did put another head on it. You might have gotten ripped on the head, and it might not be any good. I'd check it, to make sure. And if it checks out all good, I'd look at the ignition system, then the fuel system, and double check everything is hooked up right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by loudassVTEC &raquo;</TD></TR><TR><TD CLASS="quote">

You should do a compression check, and leakdown test to make sure its not the internals of the engine, since you did put another head on it. You might have gotten ripped on the head, and it might not be any good. I'd check it, to make sure. And if it checks out all good, I'd look at the ignition system, then the fuel system, and double check everything is hooked up right. </TD></TR></TABLE>

i agree... i didn't even read the original post all the way.

sorry about that.

 

thanks for the help out guys i just got back in town had to go to Boston for work. will have that stuff checked this weekend.

 

ive had the same problem since i bought my car 2 years ago. when it reaches regular temp. and idle goes down to 700, it idles rough. but, since ive bought the car, ive replaced: cap and rotor, plugs and wires, fuel filter, and i did a leakdown and compression test. i think maybe my motor mounts might be getting worn out.

 

that is exactly what mine is doing.... but how would the mounts make it do that??

 

mine used to be automatic and now its 5 speed. could that have ne thing to do with the problem?<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by benb18a &raquo;</TD></TR><TR><TD CLASS="quote">ive had the same problem since i bought my car 2 years ago. when it reaches regular temp. and idle goes down to 700, it idles rough. but, since ive bought the car, ive replaced: cap and rotor, plugs and wires, fuel filter, and i did a leakdown and compression test. i think maybe my motor mounts might be getting worn out. </TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ToNY2012 &raquo;</TD></TR><TR><TD CLASS="quote">that is exactly what mine is doing.... but how would the mounts make it do that??</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ToNY2012 &raquo;</TD></TR><TR><TD CLASS="quote">that is exactly what mine is doing.... but how would the mounts make it do that??</TD></TR></TABLE>

well the mounts are basically a shock absorber. which is why they are part rubber. im probably wrong, but with time couldnt the mounts wear out, thus making the whole car vibrate more?

 

Did you change your ECU when you did the conversion? Did the car run like this after the conversion? The ECU might be the problem...I'm not sure of the auto to manual differences, but it's a possibility...someone correct me if I am wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HONDA_TYPE_R &raquo;</TD></TR><TR><TD CLASS="quote">Did you change your ECU when you did the conversion? Did the car run like this after the conversion? The ECU might be the problem...I'm not sure of the auto to manual differences, but it's a possibility...someone correct me if I am wrong.</TD></TR></TABLE>

yes the ECU was changed. i tried 2 different PR4's and a PG7 it still did the same thing

 

The stock mounts absorb a lot of vibration. If you put aftermarket mounts in your car, the vibration goes WAY up. Get under your hood, and manually rev your motor using the throttle body. See if your motor rocks excessively, and then see if your mounts have any damage if it does. Does the engines idle bounce up and d own erraticaly?