'96 Corona shivering after engine disassembly

[number001]

Its a '96 Corona with original 2.0li 3S-FE.

Work done:
Due to oil leaks and abnormal heat emanating from the engine, the not-so-good mechanic suggested changing the cylinder head gasket and cylinder head cover gasket. He said that the cylinder head (the block containing the valves) as well as the valves needed to be machined to correct imperfections.

Symptoms
Once he put it all back together, the car never felt or sounded like its old self. Sure, it did run smoother and better than before but the engine developed a shiver-like shake. This happens on idle and the tach dips down to 500 rpm from 1,000+rpm. This intense shiver only happens on idle and occurs infrequently. The car also sounded differently from the outside. It sounded its having an asthma or hard time breathing. The not-so-good says this caused by the newly machined having to seat themselves properly???

The not-so-good mechanic also says its the car's timing which is beyond him. So he suggests a shop in Banawe that quickly declared its the "TPS" that needed replacing. So they replaced it with one meant for an Altis since they don't have a specific one for the Corona. The car still shiver but not as intense as before.

What is the problem with the car? Is it repairable? If so, which repair shop that can be trusted can do the job?

Also, its worth noting that car emits white smoke (a sign its too rich in the fuel mixture) on start ups from a cold engine only. It also seem to consume more fuel (the shop increased the fuel consumption to minimize the shivering of the engine).

Is it possible that the intake camshafts and pulleys were not torqued and assembled (in correct screw order) which might be causing all these apparent "timing" and shivering problems? Because all the parts replaced except the gaskets were all in good working condition before the disassembly.

Thanks to anyone who replies to this long story.

[jick.cejoco]

Its a '96 Corona with original 2.0li 3S-FE.

Work done:
Due to oil leaks and abnormal heat emanating from the engine, the not-so-good mechanic suggested changing the cylinder head gasket and cylinder head cover gasket. He said that the cylinder head (the block containing the valves) as well as the valves needed to be machined to correct imperfections.

Symptoms
Once he put it all back together, the car never felt or sounded like its old self. Sure, it did run smoother and better than before but the engine developed a shiver-like shake. This happens on idle and the tach dips down to 500 rpm from 1,000+rpm. This intense shiver only happens on idle and occurs infrequently. The car also sounded differently from the outside. It sounded its having an asthma or hard time breathing. The not-so-good says this caused by the newly machined having to seat themselves properly???

The not-so-good mechanic also says its the car's timing which is beyond him. So he suggests a shop in Banawe that quickly declared its the "TPS" that needed replacing. So they replaced it with one meant for an Altis since they don't have a specific one for the Corona. The car still shiver but not as intense as before.

What is the problem with the car? Is it repairable? If so, which repair shop that can be trusted can do the job?

Also, its worth noting that car emits white smoke (a sign its too rich in the fuel mixture) on start ups from a cold engine only. It also seem to consume more fuel (the shop increased the fuel consumption to minimize the shivering of the engine).

Is it possible that the intake camshafts and pulleys were not torqued and assembled (in correct screw order) which might be causing all these apparent "timing" and shivering problems? Because all the parts replaced except the gaskets were all in good working condition before the disassembly.

Thanks to anyone who replies to this long story.

it is a 3SFE, have the PCM scanned or jumper the terminals TE1 and E1 in the diagnostic terminal and observe the DTC flash on the malfunction indicator light. at the age of the car, it is possible that the fuel tank has a considerable amount of condensation which can be corrected by adding a cup of denatured alcohol if you are not already using E10.

[t2erns]

could be a timing issue. timing belt not properly indexed

[number001]

it is a 3SFE, have the PCM scanned or jumper the terminals TE1 and E1 in the diagnostic terminal and observe the DTC flash on the malfunction indicator light. at the age of the car, it is possible that the fuel tank has a considerable amount of condensation which can be corrected by adding a cup of denatured alcohol if you are not already using E10.

I read a workshop manual (for the 3S-GE, not the 3S-FE of this corona). It says that a SST is needed to trip the terminals you mentioned. Can a DIY apparatus or tool be used instead? Or does it really have to be an SST?




Also the gas tank was supposedly cleaned inside. Drained of the gas and dirt particles removed from inside. I'm not sure how they cleaned it or what method they used.

[number001]

could be a timing issue. timing belt not properly indexed

He changed the timing belt a month before doing the "major" operation. The car operated normally right up to the moment he disassembled the top part of the engine.

[jick.cejoco]

I read a workshop manual (for the 3S-GE, not the 3S-FE of this corona). It says that a SST is needed to trip the terminals you mentioned. Can a DIY apparatus or tool be used instead? Or does it really have to be an SST?




Also the gas tank was supposedly cleaned inside. Drained of the gas and dirt particles removed from inside. I'm not sure how they cleaned it or what method they used.

any conductor connected between TE1 and E1 will do. i usually use a paper clip if i can't find my SST. on a 3SFE, 3SGTE, 3SGE, there is a grounding wire right above the timing belt cover connected between the LH strut tower cavity and the alternator bracket. make sure this is properly reconnected.

[lexxus]

yun TE-E1 or TC-E1 ay ginagamit para malaman mo kung may DTC at check ng timing..bilangin mo lang yun check engine tapos malalaman muna yun problima ng EFI system..

[t2erns]

doing the what you called a major operation involves removing the timing belt (again); rechecking the timing index maybe necessary.