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1993 Oldsmobile Achieva Questions & Answers
Cost to replace valves on the 1993 olds achieva 4 cyl engine
If you take the head off and take it to an automotive machine shop for the valve work, pressure testing, inspection, and cleaning (by hot tank), you are looking at about 200-300 dollars, depending on locale and shop prices. Then you could buy the gasket set for about $75 and put it all back together. Know what you are doing and buy a repair manual to follow procedures. If it is a timing belt and not a timing chain, go with a new belt-not very expensive, under $25- and good insurance to also put in a new water pump.
If you have a shop do all the work, it will get expensive fast. Most head jobs cost a minimum of about $750. And most shops will send the head to a machine shop for that work involved, so add that to the cost.
My 1993 Achieva stalls under a load, and once restarted will repeat the stalling-what is the problem, and can I fix it
There is no one answer, it could be a lot of things causing it.
can you restart it immediately? If it takes several minutes or more before it can start, it could be an ignition problem, so you should check for spark on a plug wire right after it stalls.
If you can restart it right away, it might be a fueling problem, so you should test the fuel pressure. Autozone and others rent or loan fuel pressure testers. Fuel pressure is very important in fuel injected vehicles. If pressure is too low, fuel won't go through the injectors in sufficient volume.
If fuel pressure is at specifications, you need to check for trouble codes. This is easy to do on your 1993, doesn't require an expensive code reader or scanner- just a jumper wire or paper clip. Go here for information on how to do it and what the codes refer to:http://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method.
Replacing plugs
As it is an EFI computer controlled engine the tune up will start with having the fault codes read. The ECM unit keeps the engine tuned at all times so if there are any sensors that need replacing then hat is where the tune up starts . The biggest pitfall is wasting money replacing things that are perfectly ok (plugs HT leads etc). The over sites are things that drain engine power indicating poor performance but are not connected to the engine Items include dragging brake /pads, low tyre pressures, wheel alignments, carrying unnecessary loads/ weights
Replacing plugs what should I look for when tuning up this engine and what are traditional pitfalls and oversites?
the physical world is complex.... (experience) and the engine type tops list here. not stated.
1: old plug is wrong type.
2: was cross threaded.
3: you forgot to gap the new tread
4: forgot to hand start all plugs not causing #2
5: spark wires are bad. (looking dont count, replace them at 60k)
that means if they look good, many are bad."insulation issues"
6: IF engine has COP coils buy new boots. they are cheap. Rockauto.com
7: if engine has distributor, not changing HV wires one by one , invites getting the firing order wrong. the 2.0L and 2.5L both have Distributor.
one engine had a ICM module huge coil pack over top of engine,
with COPS under this huge cover.
there are 5 or 6 engines. the 3.1L has this ICM setup.
so tell what engine, and more pitfalls.
the non COP engines (coil over plug) , do replace the HV wires.
for BEST FUTURE.
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