Throttle bodies interchangeable?
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From: larry moe 'n curly on 28 Feb 2010 10:25 Clive wrote: > If it's a carburettor car then it's possible for the choke to be > slightly closed on starting a warm engine and this could cause > mis-firing. Carburetted Camry? Not even back in 1984, unless you're talking about one of the numerous Camry street rods. ;)
From: Michael Dobony on 28 Feb 2010 10:36 On Sat, 27 Feb 2010 18:19:24 -0800, Jeff Strickland wrote: > "Michael" <mrdarrett(a)gmail.com> wrote in message > news:568f4623-dca2-4d14-a7b5-9649d5447613(a)z1g2000prc.googlegroups.com... >> My wife's '99 Camry (~98k miles) shudders a bit when starting the >> engine while it's warm. >> >> I'm considering swapping the throttle body (and the IAC valve attached >> to it) from my '96 Camry (175k miles) to her '99, and putting hers in >> my car. >> >> Is this a bad idea? Will they even fit? Is the design significantly >> different? > > This is one of thoes, "if you gotta ask" questions. > > When it stutters enough to throw a Check Engine light, then change > something. Both of my vehicles are giving me fits with rough and harsh running, but does not give me a check engine light. They both need fixing as soon as I can get some funds available. The check engine light finally came on for an out of spec MAF sensor after months of no power, severe hesitation (having to wait for a very big gap in traffic to trust merging without an accident), and backfiring. I tried a full tune-up and it did very little for the situation. I suspect the used MAF is also out of spec, but not enough to trigger a check engine light and I don't have the funds to put it on a machine to test it.
From: Ray O on 28 Feb 2010 11:40 "Michael" <mrdarrett(a)gmail.com> wrote in message news:867fe63b-f0f4-4973-96a1-60c551c02acc(a)t9g2000prh.googlegroups.com... On Feb 27, 9:46 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com> wrote: > "Michael" <mrdarr...(a)gmail.com> wrote in message > > news:568f4623-dca2-4d14-a7b5-9649d5447613(a)z1g2000prc.googlegroups.com... > > > My wife's '99 Camry (~98k miles) shudders a bit when starting the > > engine while it's warm. > > > I'm considering swapping the throttle body (and the IAC valve attached > > to it) from my '96 Camry (175k miles) to her '99, and putting hers in > > my car. > > > Is this a bad idea? Will they even fit? Is the design significantly > > different? > > The 1996 V6 was the 3VZ-FE engine, while the 1999 V6 was the 1MZ-FE so > with > different engine series, the throttle body almost definitely will not fit. > > The 1996 and 1999 I4 engines were both 5S-FE engine but the 1999 produced > slightly more horsepower and the body style was different so they are not > likely to be interchangeable. > > Some additional information would be helpful in diagnosing the condition, > and fixing the condition is probably easier than swapping the throttle > bodies. > > What do you mean when you say that the engine "shudders a bit" when > starting > the engine while it is warm? > > Is it difficult to start when warm? > > Does it idle roughly when warm but not when cold? Yes that's exactly it. Engine gets about 100 RPM when starting while warm (never when cold). Sometimes stepping on the gas cures it; more often lately it stalls and my wife has to re-start the car. Then it's fine. I cleaned by spraying throttle body cleaner and then with motorcycle chain teflon into the little rectangle in front of the throttle plate after removing the air intake hose. This isn't an IAC problem? I thought the '99 was famous for faulty IACs, and this is one of the symptoms. I'll clean the throttle body/plate when I get a spare moment Michael **************** The answers to all of my questions above would help determine whether or not the problem is caused by a sticking idle air control "IAC" valve. There are other things that can cause the symptoms you are describing, which is why I asked all of those questions. Depending on the answers to those questions, I may have some more. How many miles are on the spark plugs, and what kind of spark plugs are installed, i.e., what brand? Never apply any kind of lubricant inside the throttle body as it can damage seals and ruin the O2 sensor and gum up the IAC valve and throttle plate. It would be a good idea to use more carb cleaner to clean off the areas where you sprayed the motorcycle chain lubricant ASAP. It is possible that the lubricant re-gummed the IAC valve. When you clean the throttle plate, wipe the edges of the plate as it can stick to the interior bore of the throttle body, and also clean where the hinge rod enters the throttle body. The IAC valve is technically not serviceable but it usually doesn't hurt to try cleaning it. While you are at it, it wouldn't hurt to clean the MAF sensor with brake cleaner (do not use carburetor cleaner or anything else on the MAF sensor) by spraying the brake cleaner into the opening, letting the stuff drip out, and letting it air dry. -- Ray O (correct punctuation to reply)
From: Ray O on 28 Feb 2010 11:43 "Michael Dobony" <survey(a)stopassaultnow.net> wrote in message news:6hoz1c2mkk4q$.151v1vgmepama$.dlg(a)40tude.net... > On Sat, 27 Feb 2010 18:19:24 -0800, Jeff Strickland wrote: > >> "Michael" <mrdarrett(a)gmail.com> wrote in message >> news:568f4623-dca2-4d14-a7b5-9649d5447613(a)z1g2000prc.googlegroups.com... >>> My wife's '99 Camry (~98k miles) shudders a bit when starting the >>> engine while it's warm. >>> >>> I'm considering swapping the throttle body (and the IAC valve attached >>> to it) from my '96 Camry (175k miles) to her '99, and putting hers in >>> my car. >>> >>> Is this a bad idea? Will they even fit? Is the design significantly >>> different? >> >> This is one of thoes, "if you gotta ask" questions. >> >> When it stutters enough to throw a Check Engine light, then change >> something. > > Both of my vehicles are giving me fits with rough and harsh running, but > does not give me a check engine light. They both need fixing as soon as I > can get some funds available. The check engine light finally came on for > an > out of spec MAF sensor after months of no power, severe hesitation (having > to wait for a very big gap in traffic to trust merging without an > accident), and backfiring. I tried a full tune-up and it did very little > for the situation. I suspect the used MAF is also out of spec, but not > enough to trigger a check engine light and I don't have the funds to put > it > on a machine to test it. It is a good idea to always check a part's operation before replacing it to avoid unnecessary parts replacement. Get some brake cleaner or electronics cleaner and spray a little in the opening for the MAF sensor, let the liquid drip out, let the part air dry, and re-install. Use carburetor cleaner to clean the inside of the throttle body, throttle plate, and IAC valve. -- Ray O (correct punctuation to reply)
From: Michael on 28 Feb 2010 21:51
On Feb 28, 8:40 am, "Ray O" <rokig...(a)NOSPAMtristarassociates.com> wrote: > "Michael" <mrdarr...(a)gmail.com> wrote in message > > news:867fe63b-f0f4-4973-96a1-60c551c02acc(a)t9g2000prh.googlegroups.com... > On Feb 27, 9:46 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com> > wrote: > > > > > "Michael" <mrdarr...(a)gmail.com> wrote in message > > >news:568f4623-dca2-4d14-a7b5-9649d5447613(a)z1g2000prc.googlegroups.com... > > > > My wife's '99 Camry (~98k miles) shudders a bit when starting the > > > engine while it's warm. > > > > I'm considering swapping the throttle body (and the IAC valve attached > > > to it) from my '96 Camry (175k miles) to her '99, and putting hers in > > > my car. > > > > Is this a bad idea? Will they even fit? Is the design significantly > > > different? > > > The 1996 V6 was the 3VZ-FE engine, while the 1999 V6 was the 1MZ-FE so > > with > > different engine series, the throttle body almost definitely will not fit. > > > The 1996 and 1999 I4 engines were both 5S-FE engine but the 1999 produced > > slightly more horsepower and the body style was different so they are not > > likely to be interchangeable. > > > Some additional information would be helpful in diagnosing the condition, > > and fixing the condition is probably easier than swapping the throttle > > bodies. > > > What do you mean when you say that the engine "shudders a bit" when > > starting > > the engine while it is warm? > > > Is it difficult to start when warm? > > > Does it idle roughly when warm but not when cold? > > Yes that's exactly it. Engine gets about 100 RPM when starting while > warm (never when cold). Sometimes stepping on the gas cures it; more > often lately it stalls and my wife has to re-start the car. Then it's > fine. > > I cleaned by spraying throttle body cleaner and then with motorcycle > chain teflon into the little rectangle in front of the throttle plate > after removing the air intake hose. > > This isn't an IAC problem? I thought the '99 was famous for faulty > IACs, and this is one of the symptoms. > > I'll clean the throttle body/plate when I get a spare moment > > Michael > > **************** > The answers to all of my questions above would help determine whether or not > the problem is caused by a sticking idle air control "IAC" valve. There are > other things that can cause the symptoms you are describing, which is why I > asked all of those questions. Depending on the answers to those questions, > I may have some more. > > How many miles are on the spark plugs, and what kind of spark plugs are > installed, i.e., what brand? Bosch spark plugs installed 30k miles ago. I took a look at the Haynes and it appears that the IAC valve resistance deviates significantly in the '99 vs. the '96. Also it appears that three bolts hold the throttle body in the '99 vs. 4 bolts in the '96. So it appears I cannot simply swap the throttle bodies. Michael |