My Maruti 800 Carb (1991): Now Restored!

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Pressing the throttle while starting the car is necessary because of the mechanical fuel pump unlike in the MPFi model which have an electrical fuel pump.

I would suggest you check the timing.What is the condition of the spark plugs?

Have you rebuilt the carb?

Just return all screws to normal position again.

This seems to be a timing issue more than anything.Have you checked the Points?

 

[adil3996]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Keith, the car starts on a single crank with a bit of pressing on the throttle pedal. After 3-4seconds the engine abruptly switches off, you can start it again but from the second time onwards there is zero idling, if you remove your foot from the throttle pedal, instantly the car switches off. In traffic, its a risky and tiring job to drive, hence I have just parked it at home and removed battery.

Also whenever you change gears, if you hold the clutch for a longer duration (more than 1 sec) the engine switches off, anything more than idling RPM is ok. No screw adjustments on the carburator seem to help, if you can suggest some procedure to adjust the screws on the carburator (with any ref pic) it will be a big help. I will still need a new/used carb,but atleast car will be in a drivable condition.

If you are in neutral, you need to keep raising the throttle to keep the engine on, hitting FE big time. On the other hand, whenever you are changing gear you are giving no throttle input so engine rpm tends to drop and switches off if you dont release clutch soon enough.

hey varun have you checked your Jet ?? even i have faced same problem in my previous 95model 800... kindly get the Jet pump cleaned or replace it...

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

AFAIK That is a vacuum spring and not the Jet,Adil3996.

 

[ss80]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Yes the carb was rebuilt completely by the mechanic, both the valves to open and close (previously jammed). I have a set of sparingly used Spark plugs doing their job in the car, do you think replacing them with fresh ones will solve the issue? Also, if the car doesnot start with a single crank then I have to wait for about 4seconds before cranking again. If I try to crank within 4secs, I hear a different noise like as if the starter motor is rotating freely. Not able to explain the exact sound sorry about that.

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Anand, have you changed the distributor points?What about the timing, has that been set correctly?

 

[ramankanythia]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Is it possible to fit electric pump in tank of m800

carb type cars have mechanical pumps we can bypass them if so

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

That will flood the carb since there is no ECU to control the pump.But it is a good idea, why don't you try it out.

 

[ss80]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Actually in that Zen which I had repainted, there was a small buzzing noise everytime you turn the key to the ignition slot. I assumed that it was a e-pump, not sure though.

I am yet to touch the distributor and other electricals.

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

You may need to change the points and set the timing correctly.Check the cap as well.Have you plugged the HT cables in the right order?

 

[ramankanythia]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Dear all

i have cleaned distributor points with sand paper
order of spark plug cables is correct i m sure about it
but i was not able to open and clean spark plugs as spanner for maruti 800 is not holding plug i think that is of different size
carb rebuild i have done without disturbing unknown adjustments.
still issue is there

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Raman, I have asked you questions on your car thread.Please reply there.

 

[Ilangop]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Keith, the car starts on a single crank with a bit of pressing on the throttle pedal. After 3-4seconds the engine abruptly switches off, you can start it again but from the second time onwards there is zero idling, if you remove your foot from the throttle pedal, instantly the car switches off. In traffic, its a risky and tiring job to drive, hence I have just parked it at home and removed battery.

As some one to key on and observe if you hear a click sound from the carburetor. There is a small solenoid (Anti-dieseling solenoid) to allow fuel while idling, but not any if engine is turned off. If you don't hear any sound, you have identified the cause. Check the wire / connector and see if it receives power. IF this part is okay, doubt the solenoid. Simply replacing it would solved the problem. But these solenoids are bullet proof, still check and share your findings.
A friend has the same problem in his 118NE which has the same carburetor. The connector to this solenoid had come part. He crimped it properly and the problem went off.
All the best.

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

As some one to key on and observe if you hear a click sound from the carburetor. There is a small solenoid (Anti-dieseling solenoid) to allow fuel while idling, but not any if engine is turned off. If you don't hear any sound, you have identified the cause. Check the wire / connector and see if it receives power. IF this part is okay, doubt the solenoid. Simply replacing it would solved the problem. But these solenoids are bullet proof, still check and share your findings.
A friend has the same problem in his 118NE which has the same carburetor. The connector to this solenoid had come part. He crimped it properly and the problem went off.
All the best.

It would be really helpful if you could post a picture of the solenoid or mark where its located on a picture.

Thanks

 

[jarpickle]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

AFAIK the 118NE does not use the same carb as the M800, although a lot of people have been known to use the latter since the stock NE carbs are hard to come by.

The M800 carb would starve the NE engine at higher speeds.

 

[ss80]

Re: Restoration of Maruti 800 1991 (Tonnes of Pics Uploaded)

Ilangop & Jarpickle:
Thanks a lot for the information. I did check the connector to the solenoid, it has 12.58V when key is in ignition slot and there is a mild click sound when key is put to the ignition slot. Here is a pic of the same. The click sound is loud when I gave the solenoid a direct 12V connection from the battery, however still the car does not idle.