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RalphD66 Posted on Sep 19, 2017

Will a vacumme leak cause hard starting? The engine starts hard when cold, then it might start right up three times in a row after warm up. then it starts hard again.

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Thomas Dean

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  • Posted on Sep 19, 2017
Thomas Dean
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Sounds like it might be ignition source...check distributor/ignition coil depending on the year and model for your vehicle. I've had the same problem with 2 past cars

  • 1 more comment 
  • RalphD66
    RalphD66 Sep 19, 2017

    it has a brand new carb, all new tune up. i guess it could be a coil problem but this truck usually dont run at all when the coil goes bad. i adjusted the valves, could they be too tight ?

  • RalphD66
    RalphD66 Sep 19, 2017

    its an 85 s10 2.8 engine

  • Thomas Dean
    Thomas Dean Sep 19, 2017

    i had a car that had a loose distributor, after spending thousands on it i finally checked my distributor...and i just replaced my ignition coil on my new car, and now in runs like a monster

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5 Related Answers

Anonymous

  • 4 Answers
  • Posted on Jan 05, 2009

SOURCE: Hard Start with trouble code 32

You should have your battery checked, it may be getting old and doesn;t have as much cold cranking power, I don;t think code 32 has anything to do with the slow cranking when cold.


Trouble Code 32 indicates that the Exhaust Gas Recirculation (EGR) valve diaphragm is not where the ECM expects it to be. The ECM controls the diaphragm with a Pulse-Width Modulated (PWM) waveform. The EGR has a vacuum bleed solenoid that adjusts the vacuum applied to the EGR valve based on this pulse width. If there is sufficient vacuum at the EGR valve, a switch closes to send a signal back to the ECM. The absence of this signal is the bases for code 32.
The conditions for setting this code are:

  • no vacuum to EGR (switch open), and
  • Code 33 or 34 (MAF error) is not present, and
  • engine running and LV8 is less than 100, and
  • coolant temperature is > 118 deg F (48 deg C), and
  • the EGR solenoid duty cycle is < 65%, and
  • the above conditions are met for more than 25 seconds


Typical causes for this code include:
1) Faulty EGR valve-to-ECM connection
2) Plugged EGR passages and/or sticking EGR valve
3) Defective EGR valve
4) Defective ECM

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Anonymous

  • 319 Answers
  • Posted on Feb 02, 2009

SOURCE: 93'Saturn engine problem:

neuar06 is correct, the temp sensor is cracked. Mine crack was so small I could not see it. But when tested it was the problem. Technitian told me once it warms up is usually when you get the problems. but could be when its cold also.

Anonymous

  • 2 Answers
  • Posted on Mar 24, 2009

SOURCE: 454 ci gm turns over hard backfires timing ok acts flooded

Check fuel pressure, and regulator. A leaking regulator gives a warm engine more fuel [ it does not like it] a cold motor does. same as a flooded motor. Good luck

Anonymous

  • 125 Answers
  • Posted on May 25, 2009

SOURCE: 88 Toy, 22R Carb, hard cold start

in your carburetor there is a priming passage. look in there with the air cleaner out and pump the butterfly it should squirt gas. if it doesn't then you need to open the top part of the carb and clean the hole with a hair clip. if this is not the problem it will be the choke but I'm 70 percent that this is the problem.

Anonymous

  • 166 Answers
  • Posted on Nov 19, 2009

SOURCE: Hard starting when cold ( engine cranks normally )

see if your engine has a ECT sensor (temp sensor that delivers information to your ECM) they are installed on the intake side of the cylinder head, it usually has 2 cables, have it checked replace if necesary

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0helpful
1answer

Engine code p1400 2011 hhr hard to start but after it starts and you drive it it starts right up

DTC P1400: Cold Start Emission Reduction Control System

Circuit/System Description
The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:
ā€¢ Engine speed
ā€¢ Spark advance
ā€¢ Throttle position
ā€¢ Engine airflow
ā€¢ Engine coolant temperature
ā€¢ Engine run time
ā€¢ Park/Neutral position
ā€¢ Vehicle speed
The actual model is then compared to the expected exhaust energy model.


Diagnostic Aids
Any loading of the engine that lowers engine RPM, such as partial application of the clutch, A/C cycling, etc. during the first 120 seconds of the engine run time may set this DTC.
Circuit/System Verification
Allow the engine to cool.
Start and idle the engine for at least 2 minutes.
DTC P1400 should run and pass.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Inspect the air intake system for the following:
ā€¢ Modified, damaged, or restricted
ā€¢ Dirty or deteriorating air filter element
ā€¢ Crankcase ventilation system for correct operation.
ā€¢ Water intrusion
ā€¢ Vacuum leak and other unmetered air downstream of the MAF sensor
ā€¢ Intake manifold leak
Inspect the exhaust system for the following:
ā€¢ Water intrusion
ā€¢ Exhaust leak
ā€¢ Damaged, restricted, modified or enhanced exhaust system.
Inspect the engine mechanical for items that could alter the air flow into the combustion chamber.


Basically it's not getting enough fuel
0helpful
1answer

My car when using when using my autovox remote starter , starts for 1 second then dies 3 times in a row when cold but works find after warming up .

Cold weather makes the engine hard to start for two main reasons. First, oil thickens when it's cold, which increases friction and makes it harder for the staner motor to spin the engine. ... You can ensure that your car will start in the worst weather by keeping the engine or the battery, or both, warm.

Cold-Weather Car Starting Tips - Nature and Community - MOTHER ...

www.motherearthnews.com/nature-and-environment/car-starting-tips-zmaz87jfzgoe https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1CHBD_en-GBGB719GB719&ion=1&espv=2&ie=UTF-8#q=car%20wont%20start%20when%20cold
4helpful
3answers
0helpful
1answer

I recently had my fuel pump go out on my 97 explorer,5.0 l. I changed it out and it ran great for 3 weeks. Then one day it didn't want to idle. Would start up but stall out and die. I got a low vaccum...

What was the PO code exactly.
The 5.0 was know for having vacumme leaks around the engine compartment and intake leaks.
The easiest way to test for an intake leak is to spray starting fluid around the intake while your having the ruff idol. If the RPMs increase then you have a vacumme leak.
It usually goes away once the engine is warmed up because the rubber expands and fills the gaps stopping the leak.

Does yours have the problem all the time or only while cold?
0helpful
1answer

My ford falcon has problem starting after 1st being run and warmed up

Could be several things . Check injectors if leaking can cause flooding and hard starting after warm up. check cold starting unit not still on after warm up . A faulty temp censer can make hard starting . Leaking injectors can be checked by fuel pressure holding steady with engine stopped .
0helpful
1answer

My car starts fine when engine is warm. I turn it off then try starting it again. then starts up and shuts back off. does it like 3 times in a row. then I wait a few minutes then it starts up when I push...

stalls, are complex
if the engine is good (compression at spec)
it this list.
1: lost electric power to EFI system or spark.
2: bad fuel.
3: bad spark.
4: bad fueling. (too much or too little.
5: EGR stuck open
6: ISC dead. or IAC dead. (idle air valves failing cold)

there are tests for each.
cold start failure only ! all else good, engine tuneup done?
1: ECT fibbing like oh'bummer. (signals water temps of alaska in Panama? "floods, and your right foot helps./..........
2: IAC (cold start fast idle air valve bad) same for right foot....
3: check engine light on running? is it?

ECT can cause gross over fueling.
the IAC dead will cause gross under AIR which in fact causes flooding (less air plus same fuel = flood)
bad fuel.


0helpful
2answers

I have a 1987 ranger 2.3 EFI and sometimes it will not start when it's cold. after it warms up outside it starts. When it does start it runs great. It always starts when warm. some times it will

Timing belt being off one tooth will not cause this problem but rather loss of power and hard starting all the time,

in the cold it will not start, the engine will spin but wont fire is this correct?

There are many things that can cause this, a little testing will be needed, the first thing that comes to mind with the ford and cold weather is the coolant temp sensor, it give computer a false reading and can cause hard starting or even no start, a scan tool would be helpful to see what temp it is give computer.
The best way to narrow this down to to check for spark when it wont start, a weak coil in cold weather will cause this problem or bad coil wire to cap, but if you can see if it has spark and let me know,
another test is to check fuel pressure, to see if it is getting fuel, and the fuelpump relay,

Let me know if it has spark or fuel when is does not start, good day
1helpful
1answer

Sl 500 1991: problem starting when engine is warm

I would check your injectors, as if they are leaking slightly, the residual fuel pressure can force some fuel into the manifold even with the car off, and it it can cause temporary flooding.

Please leave positive feedback if I have helped you

thanks
1helpful
1answer

454 ci gm turns over hard backfires timing ok acts flooded

Check fuel pressure, and regulator. A leaking regulator gives a warm engine more fuel [ it does not like it] a cold motor does. same as a flooded motor. Good luck
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