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Replaced engine 1.5 sounds like the carby hasn't got enough vac and wants to stall and miss cant find the problem checked timing and dizzy but cant get it to run good can a vac line cause the problem if put in the wrong place.

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  • Tom Mooney May 23, 2011

    Please provide the year, make, and model of your vehicle.



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Yes a vacuum line in the wrong place can do that. plug the PCV valve the plug the EGR port use a can as a shim, also make sure the timing belt or chain is on its mark.

Posted on May 23, 2011


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Honda civic ferio 2002. when driving at heavy traffic checklight appears and some times the engine stops. It restarts but the checklight does not dissapear. After scanning they refer the problem is in the...

the check light glows at ever engine, stall, below about 300 rpm

the engine stalls and the CEL glows, this is 100% normal and is the same deal key on, no started. it only means you have power to the ECU/PCM and is basically happy (rudimentary self tests pass)

there many are reasons (0ver 50 ) to cause a stall.

but of the check light glows running and over 800rpm

800 RPM (got a dash tachometer. next time see what i does)

if the CEL glows engine running that is the warning that there are

errors. not reporting the actual DTCs here, is a big issue.

each DTC has specific cause. 335? DTC?

P0340, 355, 336

and RPM dead cranking,

the ECU will infact set DTC for CKP pulse, 1 in 10 missing

it does that and you can be sure its not fibbing.

on many cars, (on engine option (size) stated, so....????)

1.7L or 2.0L? (auto or manual tranny)

the car dies the instant you loose the CKP, the crank sensor

but not all. on dizzy cars, (distributor) it runs with a cam sensor good.

but id bet yours needs the CKP to run.

if your DTC error decodes to bad CKP then you can believe that.

this assumes you did not lose, 12vdc electr. power to the EFI system.

or the wires are damage to any ckp or cmp sensor.

again, post the DTCs?

if confused or are a real serious DIY (most arent) go to and look, look up your DTC and read the reasons.

they are clear.

i just looked on line, this car even has a CKP learning procedure

do not knee jerk sway any sensor, read the FSM

see the tests to be sure its bad,

see the Vref test at the sensor, if that is bad, the sensor can no work.

eg: 336

Engine running, and the PCM detected the Crankshaft Position (CKP) Sensor \'A\' signal was missing for a short period of time. Note: This trouble code is usually caused by an intermittent fault. Possible Causes:

  • * CKP Sensor \'A\' signal circuit is open or shorted to ground

  • * CKP Sensor \'A\' signal circuit shorted to VREF or system power

  • * CKP Sensor \'A\' is damaged or has failed

  • * PCM has failed

try pulling it cleaning the connector and putting it back, (at the least), or get a real FSM for #1 top, support. from Honda or helm.

Dec 14, 2013 | Honda Civic Cars & Trucks

1 Answer

Car wont stay running unless foot is on the gas pedal

is the CEL check engine light out running? (it comes on stalled, and is normal that)
stalled. engine stall. no year, now that makes this 10x impossible
and even more impossible no engine stated, (displacement or VIN)
F22? 2.3. 2.7? 3.0L?
if in usa, (no loctation stated ) open hood, look up, see tag?
see vacuum EPA map, see engine type? bingo.

so I wall answer in the generic, (ALL CARS gasoline)
fails hot or cold engine, does hot engine reach 180F and hold?
wow, how low was the oil, off end of stick, none?
stalling is caused by over 50+ things. (we do tests to find it fast )
we use tools, do you have tools, or can buy them, or do you just want
endless guessing. here is the path.
#1 stall maker is a stuck open EGR main valve, ignored during the turn up, clean it. make sure it close
in the macro,
1: bad engine, the hot engine can lose compression and stall.
tool1 the $20buck compression guage.
2: bad spark, or timed wrong. gapped plugs wrong, wrong plugs used. bad wires sets, (old dizzy engines) bad COPS newer cars.
check for hot spark at all spark plugs, skip none.
3: bad fueling (too much or not enough
if engine runs perfect and only idle is too low 800 hot is normal
no DTC 300s misfires, then maybe the ISC is just dirty.
we clean the EGR and ISC every time.
if the EGR leaks, the fast right foot can save a stall but is hard.
if the ISC sticks closed, saving the stall is piece of cake, super easy
after all , you are adding the missing air.

does that help,. no, then take it top the man, the ASE man.
The Mechanic.with the ASE patch on his /her sleeve.
no year, ouch.

Dec 02, 2013 | Honda Accord Cars & Trucks

1 Answer

Dead missfie under load have replaced all ingnition parts ie.coil points all leads&plugs condenser dizzy cap vac advance unit vac lines rotor arm have drained fuel tank &checkedcarb replaced fuel...

The teeth on the shaft the comes out of the bass of the distributa may be worn? Also may want to check the valve seats & assembly for ware.. hope this helps

Sep 10, 2011 | Nissan Pathfinder Cars & Trucks

1 Answer

Lot53yahoo.commy jeep x 2005 a/c blows out the defrost ,did work fine then just went bad . i cant find the actuator loc or is it a vac leak ??

You've got a vac leak...somewhere.
Unfortunately, you'll have to make time to find it.
When you lose enough vacuum...the "blend door's" default position is to blow out the defrost.

I've looked for vac leaks with starting fluid, or Barryman B12.
While engine is running spray hose connections...when engine "surges"...that's where the leak is.

Hope this helps...

Aug 15, 2011 | 2005 Jeep Wrangler

2 Answers

Replaced dizzy, rotor, carby ... car will start but not idle and is a little rough feeling. help !! Leads and plugs appear fine.

make sure leads are all connected to the proper plugs!
is it a 4 or 6? a 4 would really run rough! also check spark timing.
good luck!

Oct 31, 2009 | Ford Laser Cars & Trucks

1 Answer

No spark xf

have you checked to see if you are getting power to the coil? if you are not then there is your problem, if you are then i would suggest maybe rotor button, main lead from coil to dizzy there are not too many thing that can go wrong. have you checked to see if the dizzy turns when you crank the motor?? if not you have a broken cam or timing chain. if you have replaced the dizzy then it cant be the elec pickup in there. good luck hope i have helped. matt

May 16, 2009 | 1997 Ford Explorer AWD

1 Answer

Low idling on daihatsu charade 83 model

My first thouhts are your ignition is still your problem, but upu haven't made it clear if the problem exists only when the engine is cold.

On the Charde you must push the pedal down before pulling the choke lever for the choke and fast idle linkages to engage... then start the engine.

The idle circuit consists of an emulsion tube and a solenoid. The solenoid is on the back of the carby and has a green wire running to it. If there isn't 12 volts on this at startup you wont be able to get the engine to idle without pedal assistance.

The carburettor also has an acceleration plunger that squirts a shot of fuel into the engine when trying to increase speed. This has a concetrina boot that can leak. It is situated on to op the carby.

The vacuum hoses need to connected correctly, especially one of the distributor hoses. That one must be connected to AD port on the carby. The following diagram is one of my modified layouts, but should work satifactorily. It is configured so that you can set the ignition timing a little more advanced than factory. When you set the timing make sure both hoses to the dizzy are removed and blocked. You adjust the dizzy position until the dimple on the flywheel lines up with the notch in the timing plate above.

Diagram here

For a test try blocking the hose coming from the oil cap to the bottom of the carby. The cap is also a PCV valve and if it's not clean it can allow excess air into the engine at idle.

My feeling is your points gap is not correct. It should be about the thickness of a hacksaw blade when open. The rubbing block on the points is notorious for rapid wear if hi temp grease hasn't been applied to the rotor lobes. A small gap will cause arcing under load and not provided sufficient dwell time for the coil to charge, resulting in a weak spark, missing, over fueling and lack of acceleration.

I also recommend you replace the plugs with Bosch Super 4's. They will last you a very long time and tend to be very forgiving with older worn engines.

Oct 11, 2008 | 1988 Daihatsu Charade

3 Answers

Car wont start


Jun 16, 2008 | 1990 Nissan Pulsar

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