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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  • 16 Answers

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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04 DODGE Ram hemi cylinder 3 misfire


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How to install a subwoofer and amplifier


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on Jan 28, 2011 | Honda Civic Cars & Trucks

1 Answer

My 2001 Mitsubishi Galant 4 cylinder is idling high in park and when put in drive it starts idling low, runs rough, and acts like it wants to die at stop lights


This is a typical vacuum leak. Check all the hoses. If none are sucking air then use WD40 and spray around the intake manifold. If the engine runs better or changes how it runs then look at replacing the intake manifold gasket.

Sep 26, 2011 | Mitsubishi Galant Cars & Trucks

1 Answer

1992 BMW 525i has a new fuel pump, fuel filter, spark plugs, cam sensor, ECU... Vehicle drives great on highway & city but when you pull up to a traffic light & stomp on the throttle the vehicle...


This car should have a vacuum actuated fuel pressure regulator at the front of the fuel rail. Make sure that vacuum hose is not cracked, and make sure it is getting vacuum when the car is idling. The nipple at the other end of the hose may have crud in it.
Also. make sure the vacuum diaphragm in the regulator is intact. When it fails, it usually starts leaking fuel through the diaphragm, so be careful about sucking on the hose with your mouth to see if the diaphragm is intact.
If that is not it, I would next try cleaning or replacing the crankcase ventilator valve.
A new ECU? Ouch. That wasn't cheap I'll bet.

Jan 28, 2011 | BMW 525 Cars & Trucks

2 Answers

Cylinderhead torque stc.


Cylinder Head Removal & Installation SOHC To Remove:
  1. Relieve fuel system pressure.
  2. Remove timing belt cover. Camshaft timing marks kia-03-20-7032.gif

  3. Turn crankshaft until timing mark on front housing and the arrow "2" on the camshaft pulley align.
  4. Loosen lock bolt on tensioner.
  5. Pry tensioner away from timing belt and tighten lock bolt to relieve tension on the timing belt.
  6. Remove timing belt from camshaft pulley.
  7. Disconnect battery negative cable.
  8. Remove 3 bolts that secure accelerator cable and air intake hose to cylinder head cover.
  9. Detach accelerator cable and place off to side.
  10. Remove the following;
    • Air hose
    • Air ISC air hose
    • Breather hose
    • Vacuum hose from air intake hose
  11. Disconnect mass air flow sensor electrical connector.
  12. Remove air intake hose.
  13. Remove PCV valve from cylinder head cover.
  14. Remove ISC air hose from idle speed actuator.
  15. Remove air hose from behind intake manifold.
  16. Remove 2 screws from high tension wire protectors.
  17. Detach wire loom from holder at rear of cylinder head cover.
  18. Detach vacuum tube at rear of cylinder head cover.
  19. Remove vacuum pipe. Cylinder Head Cover kia-03-20-7042.gif

  20. Remove 7 cylinder head cover bolts.
  21. Remove cylinder head cover and gasket.
  22. Disconnect 2 ignition coil electrical connectors.
  23. Disconnect 2 fuel injection electrical connectors at rear of cylinder head.
  24. Disconnect the following electrical connectors;
    • Oxygen sensor
    • Throttle position sensor
    • Idle speed actuator
    • Oil pressure switch
    • EGR vacuum solenoid valve at intake manifold
  25. Disconnect heater hose from elbow.
  26. Disconnect brake booster vacuum hose and cruise control vacuum hose from surge tank.
  27. Detach wire harness from rear of cylinder head.
  28. Disconnect purge control solenoid vacuum hose from intake manifold.
  29. Disconnect fuel hose from fuel connector assembly.
  30. Remove grounding bracket.
  31. Remove 4 bolts and intake manifold bracket.
  32. Remove starter.
  33. Detach water bypass hose from bypass pipe.
  34. Disconnect water hoses from oil cooler.
  35. Disconnect fuel hose from fuel pipe.
  36. Remove exhaust manifold heat shield.
  37. Remove exhaust flange nuts and front exhaust bracket bolt.
  38. Lower exhaust system. Cylinder head bolt loosening sequence kia-03-20-7050.gif

  39. Loosen cylinder head bolts in 3 steps in proper sequence.
  40. Remove cylinder head bolts and washers.
  41. Remove cylinder head, intake manifold and exhaust manifold as an assembly.
To Install:
  1. Install NEW cylinder head gasket.
  2. Install cylinder head, intake manifold and exhaust manifold as an assembly.
  3. Tighten cylinder head bolts in 3 steps in reverse sequence that was used during removal. Tighten bolts to 62 ft lb (84 Nm).
  4. Install front exhaust bracket bolt. Tighten bolt to 20 ft lb (27 Nm).
  5. Install NEW lower exhaust flange gasket and 3 nuts. Tighten nuts to 24 ft lb (31 Nm).
  6. Install exhaust manifold heat shield. Tighten nuts to 35 in lb (4 Nm).
  7. Connect fuel hose to pipe.
  8. Connect 2 hoses to oil cooler.
  9. Attach water bypass hose to bypass pipe.
  10. Install starter and bolts. Tighten bolts to 34 ft lb (46 Nm).
  11. Install intake manifolds bracket and 4 bolts. Tighten bolts to 32 ft lb (45 Nm).
  12. Install grounding bracket.
  13. Connect fuel hose to fuel connector assembly.
  14. Connect the following electrical connectors;
    • Oxygen sensor
    • Throttle position sensor
    • Idle speed actuator
    • Oil pressure switch
    • EGR vacuum solenoid valve at intake manifold
  15. Connect purge control solenoid vacuum hose to intake manifold.
  16. Attach wire harness from rear of cylinder head.
  17. Connect brake booster vacuum hose and cruise control vacuum hose to surge tank.
  18. Connect heater hose to elbow.
  19. Connect 2 fuel injection electrical connectors at rear of cylinder head.
  20. Connect 2 ignition coil electrical connectors.
  21. Install cylinder head cover.
  22. Install 7 cylinder head cover bolts. Tighten bolts to 60 in lb (7 Nm).
  23. Install vacuum pipe and 2 bolts at rear of cylinder head cover. Tighten bolts to 60 in lb (7 Nm).
  24. Connect vacuum tube to pipe.
  25. Connect loom holder to rear of cylinder head cover.
  26. Install 2 screws to high tension wire protectors.
  27. Install air hose to behind intake manifold.
  28. Install ISC air hose to idle speed actuator.
  29. Install PCV valve to cylinder head cover.
  30. Install air intake hose.
  31. Connect mass air flow sensor electrical connector.
  32. Install the following;
    • Air hose
    • Air ISC air hose
    • Breather hose
    • Vacuum hose from air intake hose
  33. Attach accelerator cable.
  34. Install 3 bolts that secure accelerator cable and air intake hose to cylinder head cover. Timing belt pulley timing marks kia-03-20-7035.gif

    NOTE: Timing belt pulley timing mark and timing mark must be aligned.
    Camshaft timing marks kia-03-20-7032.gif

    NOTE: The arrow at "2" on camshaft pulley must be aligned with timing mark on front housing.
  35. Install timing belt.
  36. Install timing belt cover.
  37. Pressurize fuel system.
  38. Start engine and check ignition timing.

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O3 ford escape V6 began hesitating and missing at


change the plug wires they may be bad. or you may have a bad coil

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1 Answer

Honda engine lacks power, no torque


check your compression, may be a cylinder misfire check wires and spark plugs, possibility it could be a valve dropping or improper seal within the head or block

Oct 30, 2009 | 1992 Honda Prelude

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

1997 Ford Contour with a rough idle while stopped


This is a common complaint on these cars. I own a 96 myself.
Assuming that you engine is fine and runs smoothly under normal operation, and just is rough "feeling" at idle while stopped; then I would suggest changing the motor mounts...the mounts may not be broken, but the rubber isolators get worn and soft, and transffer normal engine vibration into the chasis of the vehicle. Mine was doing the same after changing the mounts good as new again.
Please note...don't use cheap mounts, by the better grade/quality mounts.

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1 Answer

Wont idle. low power


are you sure you have wires on correct cylinders?

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