Question about 1987 Jeep Wrangler

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1987 Jeep Coughs and Sputters as it is getting up to Speed

Hello,

I recently purchased a 1987 Jeep with a 4.2 Inline 6 engine. The engine has less then 500 miles on it and I had to replace the original carb and put a Weber 2 barrel on to replace it. When you crank it a big puff of very black smoke comes out of the exhaust and if you press the gas pedal to hard as you accelerate it sputters and coughs and fights to get up to speed. It does it really bad between 25 and 35 miles an hour but I honeslty have not gotten it about 45 as I am in town and the speed limits won't allow me. I have found that if i gradually accelerate the problem is not as bad but people behind me do not really appreciate that. I do not know how old the gas is, and I have been trying to run it to run that gas out so that I can put in new hoping that may be part of the problem. the instructions with the carb say that if it is acting the way it seems to me that it is that you should change the fuel filter but that is brand new. I am hoping that the mechanic just failed to adjust it correctly but would appreciate your thoughts. I apologize for the book and if you need additional info let me know.

Thanks

Josh




I have only had the Jeep in my possesion for a few days and I have no idea how old the gas in the tank is

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I would take it out to the highway and give it a good run...it probably needs some high speed to clean it out.

Posted on Jun 17, 2009

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its"
The ignition module is mounted next to the battery on all models. It is a sealed, weatherproof unit on the 4.2L engine. 1987-90 vehicles equipped with a 2.5L engine, incorporate the coil in the control module."




seem you have this. says wiki.
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2.5 liter.

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4.0 liter.

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5.2 liter.


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42e3dc6.jpg

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Where can i find the transmission model number for my 95 jeep grandcherokee lerado the transmission is not original it has been replaced with a diferent one 2 times so just need to know where to find the...


These pages cover the transmissions used in Jeeps over the years. Transmissions are arranged by the most recently introduced transmissions first.
Factory Transmissions 45RFE: The 45RFE four speed automatic transmission was used in 1999 Jeep Grand Cherokees with 4.7L engines. 46RE: The 46RE four speed automatic transmission was used in 1998 Jeep Grand Cherokees with 5.9L engines.
44RE: The 44RE four speed automatic transmission was used in 1996 to 1998 Jeep Grand Cherokee's with 5.2L engines.
42RE: The 42RE four speed automatic transmission was used in 1993.3 to 1998 Jeep Grand Cherokees with 4.0L engines.
46RH: The 46RH four speed automatic transmission was used in 1993 to 1995 Jeep Grand Cherokees with 5.2L engines.
32RH: The 32RH three speed automatic transmission was used in 1992 to 1995 Wrangler with 4.0L engine and it continues to be used in 1997+ Wrangler with 4.0L engine.
30RH: The 30RH three speed automatic transmission was used in 1992 to 1995 Wrangler & 1992 to 1996 Cherokee with 2.5L engine.
AW4: The AW4 four speed automatic transmission was used in 1987 to 1990 Jeep Cherokee (XJ), & Jeep Comanche with 2.5L & 4.0L engines. The AW4 was also used in 1987 through 1992 Jeep Comanche & 1991 through 1998 Jeep Cherokee & 1993 through 1993.5 Jeep Grand Cherokee with 4.0L engines.
AX-15: The AX-15 is a medium duty 5 speed manual transmission. It was introduced in mid 1989 in YJs with the 4.2L engine and XJs and MJs with this engine. The first year of the Grand Cherokee (ZJ), the AX-15 was rare option only with the 4.0L engine. The AX-15 is still used in TJs and XJs with the 4.0L engine.
AX-5: The AX-5 (and AX-4, the non-overdrive version) is a light duty 5 speed manual transmission. It was used in all Wranglers from 1987 equipped with the 2.5L I4 engine. It was also used in Cherokees (XJ) and Comanches (MJ) with the 2.8L V6 and 2.5L I4.
BA10/5: The BA 10/5 is a light duty 5 speed manual transmission. It was used in all 4.2L equipped Wranglers (YJ) from 1987 to mid-1989, and all 4.0L Cherokees (XJ) and Comanches (MJ) for the same years.
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T-176, T-177, T-178: The T-176, T-177, and T-178 are a medium duty four speed manual transmission used in Jeep CJs, SJs, and J pickups from 1980-1986.
T-150: The T-150 is the 3 speed manual transmission that was used in CJs from 1976 to 1979.
T-18: The T-18 is a heavy duty four speed used in Jeeps from 1971 until 1981. It was only used in the CJ from 1971-1979.
T-15: The T-15 was used only in V8 equipped CJs and Jeep trucks from 1972 to 1975.
TH400: The TH 400 is a heavy duty three speed automatic that was used in CJs with the BW 13-39 transfer case from 1976-1979. The TH 400 was also used in full sized Jeeps (SJs and J series pickups) from the late 60s until 1979.
T-14: he T-14 is a three speed transmission used with the "Dauntless" Buick V6 and AMC I6 from 1967 to 1975.
T-86: The T-86 is one of the three speeds used with the many CJs and Jeepster Commandos with the "Dauntless" Buick V6.
T-98: The T-98 varies only slightly from the T-18. It was used from the 50s until 1970 in different Jeeps.
T-90: The T-90 was the standard three speed for CJ and their military counterparts built from 1945 until 1971. It was also the standard transmission for Willys Wagons, Willys Pickups, FC trucks, and Jeepster/Commandos during this time period.
T-84: The T-84 is a light duty three speed used in MBs and GPWs during WWII

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1 Answer

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This Info taken from Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Grand_Cherokee
Hopefully this will answer your question.

The redesigned WJ 1999 Grand Cherokee shared just 127 parts with its predecessor. The structure was stiffened by PorscheEngineering for sharper steering and lighter weight. The spare tire wasrelocated from the side of the cargo compartment to under the floor togreat relief of owners. The two heavy pushrod V8 engines were replaced by chrysler's first clean sheet V8 since the 60's (SOHC aluminium heads, plastic intake), Chrysler's then-new PowerTech. Although this engine produced less torquethan both previous V8s, it was lighter and got much better fuel economyand provided similar on road performance figures (the 23 gallon fueltank was replaced with one of a 20.5 gallon capacity). The Inline 6engine was also updated in 1999. 10 horsepower (7.5 kW) was added byredesigning the intake manifold. The manual transmission was dropped with this model.
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The 45RFE and 545RFE automatic transmission in the WJ was notable. It included three planetary gearsets rather than the two normally used in a four-speed automatic. Thisgave it six theoretical speeds, and it would have been the firstsix-speed transmission ever produced in volume, but it was programmedto only use five of these ratios. Four were used for upshifts, with adifferent second gear for downshifts. Although five of the six ratioswere used, Chrysler decided to call it a "4-speed automatic". In 2001,the programming was changed to make use of all six ratios. Rather thanhave six forward gears, the transmission was programmed to act as afive-speed with the alternate second gear for downshifts. The RPM at70 miles per hour (110 km/h) on a 545RFE is 2000 rpm, 200 rpm less thanthe 45RFE programming. 1999 and 2000 model year WJ owners can havetheir 45RFE transmission's programming flashed to enable the extra gearas both transmissions are physically the same. The 42RE 4-speedautomatic remained the transmission for the Inline 6 engine. It was notchanged from the previous model Grand Cherokee's.

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1 Answer

1990 jeep wrangler coughs and dies when driving


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1 Answer

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