Need advice: 4g93 SOHC auto 'semput'

[vr2turbo]

You buy engine time did not check the engine out? And are you sure is head gasket leaking or maybe valve cover or something else? What I mean is since budget restricted make sure you are repairing things that needs repair.....

 

[sanekit]

You buy engine time did not check the engine out? And are you sure is head gasket leaking or maybe valve cover or something else? What I mean is since budget restricted make sure you are repairing things that needs repair.....

I did not buy the engine. The shop that did the installation bought the whole half cut and sold me the engine complete all in with wiring, dashboard set and steering for RM6k. It was a good deal. After installation, i did test it out. The gearbox felt smooth at that time, no white smoke coming out, aircond super cold, crank once without stepping on gas engine straight away fired up.

Then when all is complete, the ISC went wonky causing the idling problem. Now gearbox needs checking coz not that smooth during gear change (felt a hard pull). So far, no problem during cold start (crank once straight away start). Just the gearbox problem like I mention and the loud tappet sound.

I'm sending to my mechanic friend to do a check if it really needs a top overhaul. Waiting for him to clear his schedule. Meanwhile, any recommended place to diagnose my gearbox?

 

[vr2turbo]

Wah! 4G93 SOHC already RM6k, anyway for your gb your mechanic cannot check?

 

[sanekit]

Wah! 4G93 SOHC already RM6k, anyway for your gb your mechanic cannot check?

RM6k include transplant. My mechanic friend can't check the gearbox. I went to Win Tech Auto at Subang Hi-Tech just now. After diagnose and computer check, workshop said clutch burned (weird funky smell from ATF oil). Pressure not stable hence the lag and jerking. Overhaul and replace all oil seals and gasket. Total RM1.5k inc. GST. Friday or Saturday can pickup the car.

 

[vr2turbo]

RM6k include transplant. My mechanic friend can't check the gearbox. I went to Win Tech Auto at Subang Hi-Tech just now. After diagnose and computer check, workshop said clutch burned (weird funky smell from ATF oil). Pressure not stable hence the lag and jerking. Overhaul and replace all oil seals and gasket. Total RM1.5k inc. GST. Friday or Saturday can pickup the car.

Include transplant then not too bad. Workmanship can come to 1k plus.
Try fitting atf cooler after repair, and/or dump is a bottle of Lubegard atf additive

 

[sanekit]

Include transplant then not too bad. Workmanship can come to 1k plus.
Try fitting atf cooler after repair, and/or dump is a bottle of Lubegard atf additive

Alrighty. Will check with the shop when it's done. Hopefully no more problems in the near future. haha!

 

[vr2turbo]

Alrighty. Will check with the shop when it's done. Hopefully no more problems in the near future. haha!

Burnt smell probably overheating issues, make sure atf service at recommend intervals also....

 

[Shinjite]

UPDATE: After changing the ISC and fuel filter, no more serious idling problem except while aircond compressor is on, timing went up a bit. No more serious 'semput'-ness but engine still idle a bit low (600-700rpm) when gear is in D and aircond is on. Gearbox gradually feeling a bit better but I still feel I need to send it for check up.

Gonna send it for top overhaul next month. Any tips on that? :)

When you are in gear, the idle will drop a bit because you are causing load to the engine via the GB as well as the aircond compressor (double whammy). Not only that, when your radiator fan kicks in, it sips power as well causing load. Try raising your idle timing a little higher let's say 900rpm to 1000rpm on pure idle without the radiator fan kicking in, without air-cond turned on and not in gear.

Installed any grounding wires?

 

[sanekit]

When you are in gear, the idle will drop a bit because you are causing load to the engine via the GB as well as the aircond compressor (double whammy). Not only that, when your radiator fan kicks in, it sips power as well causing load. Try raising your idle timing a little higher let's say 900rpm to 1000rpm on pure idle without the radiator fan kicking in, without air-cond turned on and not in gear.

Installed any grounding wires?

Engine idling set at 1100 RPM without aircond and with aircond on. Gearbox was faulty. Waiting for the rebuild to be done tomorrow. So far, when the compressor kicks in after driving, in N the idling went up to 1400rpm. Previously the ISC was indeed messed up. RPM stays at 900 during cold start before replacing the ISC.

No ground wires (those fancy one) installed. Just the stock wires from half-cut. Considering to add that and a voltage stabilizer when I get my car back. Hopefully the gearbox will be in good shape after the rebuild.

 

[Shinjite]

Aaahhh, getting a manual?

 

[sanekit]

Aaahhh, getting a manual?

Nope. Overhaul my auto gearbox. Just called the workshop. I can pickup my car this evening. Will update on the progress.

 

[Shinjite]

Nope. Overhaul my auto gearbox. Just called the workshop. I can pickup my car this evening. Will update on the progress.

Hopefully all is well this time :)

 

[sanekit]

Hopefully all is well this time :)

Just got back my car. So far all the semput-ness no more. It was the gearbox after all. There was heavy traffic from Subang Hi-tech heading to my place at Subang Bestari. Gearbox works smoothly running through the traffic jam. No more jerking or timing drop like crazy.

I then get to test the shifting at Guthrie highway. Car was on Eco mode and managed to hit 140km/h effortlessly. There's some knocking sound at high RPM (6500). Maybe need to go adjust the tappets coz it's a bit loud.

Any workshop should be able to do the adjustment right?

 

[Shinjite]

Just got back my car. So far all the semput-ness no more. It was the gearbox after all. There was heavy traffic from Subang Hi-tech heading to my place at Subang Bestari. Gearbox works smoothly running through the traffic jam. No more jerking or timing drop like crazy.

I then get to test the shifting at Guthrie highway. Car was on Eco mode and managed to hit 140km/h effortlessly. There's some knocking sound at high RPM (6500). Maybe need to go adjust the tappets coz it's a bit loud.

Any workshop should be able to do the adjustment right?

Yea any workshop can do but best to go back to your trusted mechanic if you have one. When you changed your ISC, was the current one already bad condition to begin with?

 

[vr2turbo]

Rebuild woh! means repair his auto gb......lol

 

[sanekit]

Yea any workshop can do but best to go back to your trusted mechanic if you have one. When you changed your ISC, was the current one already bad condition to begin with?

The ISC looks pretty bad. No choke during cold start. Now way better and after gearbox repair, timing is a lot smoother. I set the idling to 1100rpm when aircond is on. Gonna go and adjust the tappet and knocking next week. So far, I'm very satisfied with the car after the gearbox repair.

Rebuild woh! means repair his auto gb......lol

I hentam the terms. hahaha! but the shop did dismantle everything, replaced the clutch, oil seals gasket etc.

 

[Shinjite]

The ISC looks pretty bad. No choke during cold start. Now way better and after gearbox repair, timing is a lot smoother. I set the idling to 1100rpm when aircond is on. Gonna go and adjust the tappet and knocking next week. So far, I'm very satisfied with the car after the gearbox repair.

That's good news indeed. After readjusting the tappets, then can say your car's problems are fixed

 

[sanekit]

That's good news indeed. After readjusting the tappets, then can say your car's problems are fixed

Oh, well. I sent the car to the mechanic who did the engine transplant to adjust the tappets and pinging and also change the muffler to twin-tip s-flow. I think he messed up the ignition timing. The car feels sluggish now. Before, the acceleration was ok but there was pinging at 4500 rpm during acceleration. After tappets adjustment, the pinging starts at 3500 rpm.

Now no more pinging but the acceleration is sluggish as hell and hunting idle as well. He said need to check the car computer coz if he adjust the distributor, the pinging will come back. Something to do with incorrect air fuel ratio. Is this right? Or he doesn't know what he's doing?

 

[vr2turbo]

If sluggish and no pinging he could have retard the timing quite far back....

 

[kayour]

with the use of ficd, u need to disable the original ISC....

im using 2 ficd...1 for cold start and another one for ac.....because my car isc went crazy idiotic setting....now worn gear..no check engine light, tps voltage setting was correct....but acting weird when morning cold start works fine...then alter 20mins trip or 30mins trip..stopping at traffic light, the idle speed will increase to above 1200rpm.... sometimes ok..sometimes not....so i locked the isc to predetermined setting, remove the gear linking isc to the stepper motor...then put 2 ficd..problem solved...now i got manual cold start choke and ac idle speed control..which both i can manually fine tune with just screwdriver (*i'm a manual man)

seem i need 2nd ficd for cold start too la