Question about 1990 Honda CRX

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Car idles great but when driving acts like only on 3 cylinders

I swapped from a d16 to a d15 and not sure if i got all the vacuum hoses in the right spot or if something else is wrong. like i said car will idle almost like new but when i hit the gas its very hesitant and back fires through the intake. so the first biggest thing that would help is just a picture of a running one so i can check vacuum hoses.

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Bro. what u need is a b18 ls Vtech, or b16 swap.if u swap ur rex. hit me up

Posted on Feb 22, 2009

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My 1993 Honda Accord Idles up and down in Park and neutral. I changed the idle sensor on it. What else could it be???


An intake gasket vacuum leak can cause this also. Sometimes you can isolate the problem by spraying carburetor cleaner at the head/intake mating surface while the engine is running. The fluid will cause a momentary stable idle when you find the right spot by plugging the leak. Could be a leaking vacuum hose too.

Dec 31, 2010 | 1993 Honda Accord

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How to install a subwoofer and amplifier


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on Jan 28, 2011 | Honda Civic Cars & Trucks

2 Answers

91 S10 rough idle, stalling ALDL problems


Make sure there is no vacuum leaks.


Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.


SEE SAMPLE PICTURE HERE


This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.


Intake manifold AND/OR vacuum lines.


Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.


Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the RPM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.


PLEASE RATE my answer if it is useful to you.

Dec 17, 2009 | Chevrolet S 10 Cars & Trucks

2 Answers

Idles to high


Some air coming thru in inlet manufold. Check hoses.

Nov 29, 2009 | 1997 Honda Civic

2 Answers

1998 318ti erratic idle


you probly have a vaccum leak they are hard to find but make a very noticable difference when you find them. touch all small hoses untill you find something that changes

Oct 31, 2009 | 1999 BMW 318 ti

1 Answer

Is it possible to make a d15b carburator engine to a vtec


In my opinion it is not worth it. In order to make your d15 a vtec engine, you will have to put a d16 head on it. That will require drilling new oil ports, converting the engine to fuel injection, changing out the computer, and a whole lot more things. You would wind up spending more money doing that than just doing a d16 complete swap. plus the d16 will have more power over all anyway compared to the d15 vtec. d15 is a 1.5L the d16 is 1.6L reguardless your gonna have more power with a d16. Just a suggestion.

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2 Answers

It idles to high


Try taking it for a service. Not trying to be funny. But most mechanics will hopefully attempt to tell you what is wrong with the vehicle and can save you a lot of time, money and headaches!!! At least then you can decide on your next course of action as it can be many factors leading to a high idle!!

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Car stalls while in gear and idleing


your throttle body maybe dirty inside.clean it up.if this doesnt help check power going into your throttle position sensor and make sure your idle control valve is not blocked.these are all possible causes for your problem.

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Check all vacuum hoses for leaks, check cap rotor wires and coil for arcing.

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You have a vacuum leak for sure. Look and listen carefully for anything left off, maybe an egr valve or pcv hose, brake booster line?

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