Cultus engine and body overhaul and rebuild

[imranbhatti]

if the T valve is perfect then you must see the guage needle in middle all the time , because T valve holds the water circulation till it reached certain temp , i dont belive you buy a original T valve

Well I checked one of my friends car which is VXR 2007 model with FF CNG & T valve claimed not to be removed & that car's Temp Guage response is also same as in mine. I Doubt that the earlier model sold in pakistan are equiped with 88 C T valve while the later ones are sold with 82 C by paksuzuki. Thepage # 380 of Instruction manual also says that operating temp is 88 C. Have u check ur car on Highway in cold weather? i believe with 82 C T Valve it shud be same as i posted in previous pics Coz Radiator Fan triggers On at above 91 C & that time Temp guage needle is almost in half so the difffence of ~10 Degree C on temp guage must reflect this much diffrence.

[S9y143]

very informative topicc keep up the good work nd ..BOL

[agoodfriend]

[agoodfriend]

[agoodfriend]

[agoodfriend]

[agoodfriend]

I Doubt that the earlier model sold in pakistan are equiped with 88 C T valve while the later ones are sold with 82 C by paksuzuki.,,,,,,,,,,,,,,,i dont agree , because the T valve which i instal in my 07 cultus is the one which my cousion has grounded it from his 03 FF CNG cultus , he ground it for no reason and now using plain water as coolant,,,,,,,,,,,,,second i will conform on my 07 FF CNG cultus that what T valve it is using,,,,,,,,,,,,,,
but the valve which i got from my cousion reads 82 DC ,,,,,,,,,,,,and you are saying the older models comes with 88 DC ,,,,,,,,,,,,,,,,,,,,

Thepage # 380 of Instruction manual also says that operating temp is 88 C. Have u check ur car on Highway in cold weather? i believe with 82 C T Valve it shud be same as i posted in previous pics Coz Radiator Fan triggers On at above 91 C & that time Temp guage needle is almost in half so the difffence of ~10 Degree C on temp guage must reflect this much diffrence.[/QUOTE]

yes thats the point,,,,,,,,,,,may be valve opens at 88 DC and fan triggers on 91+ DC,,,,,,,,,,,,well i will say your after market T valve is not reliable,,,,,,,,,,,,,
i will conform in my 07 cultus whose gauge aways stands still in middle that what T valve it is using ,,,,,,,,,,,,,,,,,,,,

[agoodfriend]

A bit confusion here in my understanding. Would you suggest that the fuel pump should keep running on CNG as well provided that the return line is before solenoid??

I thought it should be better to turn the fuel pump ON only when FUEL solenoid is energised. In this case, return line can be routed after solenoid.

Regarding the wire routing issue, you just need to disconnect the pump +ve and connect it to solenoid +ve near the CNG switch. Not a big issue. Is usually done near driver side foot panel.

yes you are right , i also think same ,,,,,,,,,,,,,but need some expert suggestion,,,,,,,,,,,,,,,,,you see in mehran ,,,,,,,,,,,,,,,,its imposible in mehran ,,,,,,,,,,,,because it comes with mechanical fuel pump which is connected with distributer,,,,,,,,,,,,,,,this pump cant be stoped in any way,,,,,,,,,,,,,,,,,,,,,and the return fuel pipe passes through the carburator,,,,,,,,,,,,,,means when we run it on CNG the fuel pump outlet is totally blocked,,,,,,,,,,,,,,,,no way the fuel pump can be stoped,,,,,,,,,,,,,,,and no way that the fuel can be passed through the return pipe,,,,,,,,,,,,,,,,,,,,,,,in this case you have heared from many mehran oweners that there fuel pump goes out of order when they wont run the engine on petrol

serious debate needed to save the fuel pump ,,,,,,,,,,,,,
i guess the option of connecting the fuel pump 12 V supply to the solenoid valve is batter option,,,,,,,,,,,,,,,,,but may be we need to add a relay in this cirucit and connect the pump direct to the battery becuase there is no enough amp on that solenoid valve wire,,,,,,,,,,,,,,,the fuel pump wire passes through the fuse box near acclerator cable and it can be easily altered from there ,,,,,,,,,,,,,

[agoodfriend]

it is return pipe itself which take coolant from temp sensor and its other end is connected to water pump inlet main pipe.

nope its not a return pipe ,,,,,,,,,,,,,,the pipe connection starts from the radiator outlet,,,,,,,,,means cool coolant passes from there and end up in a dead end ,,,,,,,,,,,,,there is no circulation going on there,,,,,,,,,,,,,,,,,,,the right answer for that pipe is still need to find

[agoodfriend]

can you post a more complete description of the heat switch diagram - by the scheme it looks like a normally open switch thats going to the A/C amplifier.

On a full manual system this would trip a SPDT relay to "disconnect" the A/C main current wire. The last time I worked on a margalla was long ago - and racking my head I believe there was a cutoff relay in the system. The problem is that I dont remember did this relay function alone or with a companion relay.

Test the temperature on what this switch operates, then make a self cool down system through a timer (5 or 10 minutes), meaning that with engine off and hot - if this switch trips, a 5 minute timer should open up a power circuit to enable the radiator fan to run with the engine off - it should go off once this switch closes or the timer trips.

its really hard to find the complete circuit diagram of paksuzuki cultus , there are some for foreighn models but they are no use for us ,,,,,,,,and there is a SPDT replay in a fuse box next to battery,,,,,,,,,,,and i also think that sensor yellow/black wire goes into the A/C amplifier but will figure out all when overhaul the AC ,

[amansoor]

I Doubt that the earlier model sold in pakistan are equiped with 88 C T valve while the later ones are sold with 82 C by paksuzuki.,,,,,,,,,,,,,,,i dont agree , because the T valve which i instal in my 07 cultus is the one which my cousion has grounded it from his 03 FF CNG cultus , he ground it for no reason and now using plain water as coolant,,,,,,,,,,,,,second i will conform on my 07 FF CNG cultus that what T valve it is using,,,,,,,,,,,,,,
but the valve which i got from my cousion reads 82 DC ,,,,,,,,,,,,and you are saying the older models comes with 88 DC ,,,,,,,,,,,,,,,,,,,,

Thepage # 380 of Instruction manual also says that operating temp is 88 C. Have u check ur car on Highway in cold weather? i believe with 82 C T Valve it shud be same as i posted in previous pics Coz Radiator Fan triggers On at above 91 C & that time Temp guage needle is almost in half so the difffence of ~10 Degree C on temp guage must reflect this much diffrence.

yes thats the point,,,,,,,,,,,may be valve opens at 88 DC and fan triggers on 91+ DC,,,,,,,,,,,,well i will say your after market T valve is not reliable,,,,,,,,,,,,,
i will conform in my 07 cultus whose gauge aways stands still in middle that what T valve it is using ,,,,,,,,,,,,,,,,,,,,[/QUOTE]

My 05 carby cultus also have 82 C marked on T state bt when i travel on highway at 110 or 120 km/h temp guage needle drops from center point. I know my T state is 100% orignal.

[Xulfiqar]

A bit confusion here in my understanding. Would you suggest that the fuel pump should keep running on CNG as well provided that the return line is before solenoid??

I thought it should be better to turn the fuel pump ON only when FUEL solenoid is energised. In this case, return line can be routed after solenoid.

Regarding the wire routing issue, you just need to disconnect the pump +ve and connect it to solenoid +ve near the CNG switch. Not a big issue. Is usually done near driver side foot panel.

The main reason suzuki does not wire the pump to the CNG solenoid is fire-hazard in a crash. In the original setup - the fuel pump will stop when the alternator stops spinning even with ignition key in ON position. with CNG wiring it would be ON regardless of condition.

all electric fuel pump cars are like that, even the old Mazda 1500 and 929s were like that, their fuel pump were run by AC voltage relay that got signal from the coil negative (rpm) wire. It was also done due to safety.

[amansoor]

i need help with fuel convertor switch as it start problem whenever i want to convert to petrol from cng. Only a click sound comes from switch and all leds blink once then return on cng state again with no change. And some time car start missing when this heppens its due to mixing a small amaunt of petrol with gas i think. Is it switch problem or some relays which didnt pickup fuel pump load. Plz help me

[agoodfriend]

i need help with fuel convertor switch as it start problem whenever i want to convert to petrol from cng. Only a click sound comes from switch and all leds blink once then return on cng state again with no change. And some time car start missing when this heppens its due to mixing a small amaunt of petrol with gas i think. Is it switch problem or some relays which didnt pickup fuel pump load. Plz help me

problem can only be solved by simply changing the switch with the original one but one last desperate try can be made by introducing a single point relay on 2 black coils of CNG regulator ,,,,,,,,,,,,,,,,,,,,,in my case this totaka works,,,,,,,,,,,,,

[agoodfriend]

The main reason suzuki does not wire the pump to the CNG solenoid is fire-hazard in a crash. In the original setup - the fuel pump will stop when the alternator stops spinning even with ignition key in ON position. with CNG wiring it would be ON regardless of condition.

all electric fuel pump cars are like that, even the old Mazda 1500 and 929s were like that, their fuel pump were run by AC voltage relay that got signal from the coil negative (rpm) wire. It was also done due to safety.

ok so if this is the reason then even then we can control that pump , simply introduce a single point replay powered by the solenoid coil input,,,,,,,,,,,,,,replay will switch on when solenoid is on and inturns switches on the pump,,,,,,,,,,,,,pump will stop when alternator dies because its still getting supply from its original connections ,,,,,,,,

[agoodfriend]

hele PWs here i do some modification in my car fuel pump to save it from excessive wear and premature failure , in normal condition fuel pump keep on running even when the car is converted on CNG and at that time its supply line is blocked which puts extra load on it and casses it to fail , this is a common problem in those cars which mostelly run on CNG , many time it happens that your fuel pump fails , so by this simple mod you can save it , all you need is a single point replay and figuring out some cable under your carpet near acclerator pedel , cables colors are mention in pic , all process need not more than 10 min , now fuel pump will only run when i shift my car from CNG to petrol and shuts off while car is on CNG ,,,,,,,,,,,,,,pump will only run while engine is running and will switch off as it dies (while the ignition is still on),,,,,,,,,,,i guess i can save the fuel pump for alteast some time ,,,,,,,,,,,,,will be help full you guys must gave it a try ,,,,,,,,

n

[agoodfriend]

[Xulfiqar]

nice approach - but you should also look into installling a snubber in the relay coil wiring. Otherwise the collapsing field shock can damage the CNG switch.

[mirzahadi]

I have a couple of problems with my Cultus 2006. I was just wondering if I should open a new thread on that or start posting here. Thanks

[agoodfriend]

nice approach - but you should also look into installling a snubber in the relay coil wiring. Otherwise the collapsing field shock can damage the CNG switch.

a simple rectifier diode wired in parallel with an inductive load can also be used as a snubber ?