[i.1979]

i was looking for the safari workshop manual and one of my friend who has a dealership of tata commercial vehicles, promised me he will arrange one for me. i think this can also be used for Safari. once again thanks for sharing the link.

[ankur_gupta10]

My truck is failing Pollution check. I am being told the HSU% is greater than 65. There is no visible smoke, and my engine is also not noisy. Which leaves me very confused.

1. Can the system D i always add cause high HSU?
2. What is this HSU% and what causes it?
3. I have cleaned the air filter also.

[Prowler]

Originally Posted by ankur_gupta10

My truck is failing Pollution check. I am being told the HSU% is greater than 65. There is no visible smoke, and my engine is also not noisy. Which leaves me very confused.

1. Can the system D i always add cause high HSU?
2. What is this HSU% and what causes it?
3. I have cleaned the air filter also.

Check with another center to rule out a faulty meter if you really think that the exhaust doesn't contain smoke. HSU is Hartridge Smoke Unit which measures the smoke density.

Ideally you should check the Pollution after the engine has warmed up and reached its normal operating temperature ( your temp gauge should be at the center). Ideally before you check, drive spiritedly at high throttle for a few minutes to 'clear' its throat.

[cool_dube]

Idle RPM on my Safari fluctuates (approximate range 800-600) for the first few minutes of starting the engine after the car has spent a cold (temp ~5 deg C) night in the outdoors. No start-up issues though - single crank start! No black smoke either! Also, no issues in regular city starts (Bangalore temperature does not go below 10 deg C in any case).

I had told this to TASS when I gave the vehicle for its 3-year service and as expected, I was told that there is "no problem as per laptop diagnosis". Faced this issue again last week. What could be wrong here - clogged injectors? Malfunctioning fuel temperature sensor?

[ankur_gupta10]

Where do people in Delhi get the PUC certificate without bribing?

[amitk26]

Originally Posted by cool_dube

Idle RPM on my Safari fluctuates (approximate range 800-600) for the first few minutes of starting the engine after the car has spent a cold (temp ~5 deg C) night in the outdoors. No start-up issues though - single crank start! No black smoke either! Also, no issues in regular city starts (Bangalore temperature does not go below 10 deg C in any case).

I had told this to TASS when I gave the vehicle for its 3-year service and as expected, I was told that there is "no problem as per laptop diagnosis". Faced this issue again last week. What could be wrong here - clogged injectors? Malfunctioning fuel temperature sensor?

Ask them to do injector back pressure test on cold engine. laptop will not show any error code. For this you need to leave the vehicle as it can be done only once in a day. Yes this is due to injectors clogging, Get it done if it is in warranty don't bother if you have to pay from your pocket.

[jaysmokesleaves]

Originally Posted by tsk1979

Of late I have seen that while turning the steering in parked vehicle, it often jams for a bit. So getting out of parallel parking spots is tough.
Steering damper was changed, but it did not improve things.
My SA is telling me that pump is weak, but if pump it weak why does it only jam at some points. I suspect something "mechanical" is causing obstruction somewhere.
What should I check?

Tanveer, when they replaced my steering box under warranty it initially behaved the say way as you mentioned. they tried a few adjustments here n there but no improvement.
So i gave up on the TASS and continued to drive around. The box has now "freed" itself.

[simply_sunny001]

Originally Posted by ankur_gupta10

Where do people in Delhi get the PUC certificate without bribing?

Go to gurgaon, when you go from Iffco Chowk towards malls, there is a Pump on left, get it done there. no hassles

and there must be many PUC booths as i was never even asked for test at any booth, they just took a pic of number plate and gave me the certificate.

30 Rs it used to be when i did last time in 2010.

[mercedised]

My car steers to right when braking hard, this generally happens when the speed is high and I have to brake hard, the steering shudders and I find it hard to keep the car straight. What might be the problem? The brakes are also feeling spongy, the brake pads are 10K kms old.

[bj96]

Originally Posted by simply_sunny001

...i was never even asked for test at any booth...30 Rs it used to be when i did last time in 2010.

Same here in Pune. They just ask casually "gaadi regular service mein hai na" (car is regularly serviced or not) . However, sometimes I insist them to probe the exhaust to be sure myself. The PUC rate is 120/- here I think (last done ~6 months back).

Originally Posted by mercedised

My car steers to right when braking hard, ... speed is high ...The brakes are also feeling spongy...

Your Safari is a Rightist Jokes apart, usual suspects are alignment, unequal tire air pressure or leak in the hydraulic lines? Check signs of dampness around drain nipple on brake lines.


-BJ

[condor]

Originally Posted by ankur_gupta10

My truck is failing Pollution check. I am being told the HSU% is greater than 65.

This may not help, but no harm in trying - run the vehicle at higher RPM's for a few minutes. If your normal running is at 2k rpm, then run it at 3-3.5k rpm (can do it by using a lower gear at relatively higher speed).

Try fuel from a different bunk.

THe System-D should not cause a problem.

[amitk26]

But key question is why it is failing emission test? Till now I get emission values far lower then the limit.

[sierrakamat]

Originally Posted by cool_dube

Idle RPM on my Safari fluctuates (approximate range 800-600) for the first few minutes of starting the engine after the car has spent a cold (temp ~5 deg C) night in the outdoors. No start-up issues though - single crank start! No black smoke either! Also, no issues in regular city starts (Bangalore temperature does not go below 10 deg C in any case).

I had told this to TASS when I gave the vehicle for its 3-year service and as expected, I was told that there is "no problem as per laptop diagnosis". Faced this issue again last week. What could be wrong here - clogged injectors? Malfunctioning fuel temperature sensor?

My GRANDE had the same problem was traced to a faulty heater plug after leaving the vehicle with TASS for 5 days.
This fault was not diagnosed on the laptop and before that they had tried to sort it out by replacing the injectors but that did not help.

[ankur_gupta10]

Originally Posted by amitk26

But key question is why it is failing emission test? Till now I get emission values far lower then the limit.

I decided to read all about the HSU% and what it is. It is just an opacity measure i.e. how black the smoke is. The smoke from truck exhaust is not at all black. The smoke is hardly visible, untill i accelerate real hard in 2nd gear. So i think the problem in delhi is rampant corruption, PUC guys want you to pay extra, and hence this tactic of saying that the vehicle is polluting. Best part is that they will not give you the fail certificate either. And incase you agree to pay them few bucks extra, you can have the pass certificate.

[cool_dube]

Originally Posted by amitk26

Ask them to do injector back pressure test on cold engine. laptop will not show any error code. For this you need to leave the vehicle as it can be done only once in a day. Yes this is due to injectors clogging, Get it done if it is in warranty don't bother if you have to pay from your pocket.

My Safari is under extended warranty

Originally Posted by sierrakamat

My GRANDE had the same problem was traced to a faulty heater plug after leaving the vehicle with TASS for 5 days.
This fault was not diagnosed on the laptop and before that they had tried to sort it out by replacing the injectors but that did not help.

You mean the glow plug?